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Materials (R)
    Classes of materials (Rb)
        States of matter (Rbb)
            Solids (Rbbb)
            Fluids (Rbbf)
                Bubbles (Rbbfb)
                Hydraulic fluids (Rbbfh)
                Inviscid fluids (Rbbfj)
                Liquids (Rbbfm)
                    Liquefied gases (Rbbfmm)
                         Use For: Compressed gases
                    Mist (Rbbfmp)
                Gases (Rbbfs)
                    Noble gases (RBBFSJ)
                         Use For: Inert gases
                         Related Term (Associative): Group 0 elements (Rbcefk)
                    Vapors (Rbbfsv)
                         Use For: Vapours
                        Condensate (Rbbfsvc)
                        Distillates (Rbbfsvd)
                Viscous fluids (Rbbfv)
        Chemicals (Rbc)
             Related Term (Associative): 
            Molecular structure (Rbcb)
                Atoms (Rbcbb)
                    Subatomic particles (Rbcbbs)
                        Atomic nucleus (Rbcbbsb)
                             Use For: Nucleus (Physics)
                        Electrons (Rbcbbse)
                        Neutrons (Rbcbbsn)
                        Protons (Rbcbbsp)
                Ions (Rbcbf)
                    Anions (Rbcbfg)
                    Cations (Rbcbfm)
                Isotopes (Rbcbs)
                    Radioisotopes (Rbcbsr)
                         Use For: Radioactive isotopes
                Molecules (Rbcbv)
                    Monomers (Rbcbvm)
            Chemical elements (Rbce)
                 Use For: Elements
                Classes of chemical elements (Rbceb)
                    Alkali metals (Rbcebb)
                    Halogens (Rbcebh)
                    Nonmetals (Rbcebn)
                    Trace elements (Rbcebr)
                         Use For: Micronutrients
                    Transuranium elements (Rbcebt)
                Chemical elements by group and name (Rbcef)
                    Group I elements (Rbcefb)
                        Hydrogen (Rbcefbd)
                            Deuterium (Rbcefbdd)
                            Tritium (Rbcefbdt)
                        Lithium (Rbcefbm)
                        Sodium (Rbcefbs)
                    Group II elements (Rbcefc)
                        Barium (Rbcefcb)
                        Beryllium (Rbcefcd)
                        Calcium (Rbcefcm)
                        Magnesium (Rbcefcq)
                    Transition elements (Rbcefd)
                        Cadmium (Rbcefdb)
                        Chromium (Rbcefdc)
                        Cobalt (Rbcefdd)
                        Copper (Rbcefde)
                        Gold (Rbcefdf)
                        Iron (Rbcefdg)
                        Manganese (Rbcefdh)
                        Mercury (Rbcefdj)
                        Molybdenum (Rbcefdk)
                        Nickel (Rbcefdm)
                        Palladium (Rbcefdn)
                        Platinum (Rbcefdo)
                        Potassium (Rbcefdp)
                        Silver (Rbcefdq)
                        Titanium (Rbcefdr)
                        Tungsten (Rbcefds)
                        Vanadium (Rbcefdu)
                        Zinc (Rbcefdv)
                        Zirconium (Rbcefdw)
                    Group III elements (Rbcefe)
                        Aluminum (Rbcefem)
                             Use For: Aluminium
                             Related Term (Associative): 
                        Boron (Rbcefer)
                    Group IV elements (Rbceff)
                        Carbon (Rbceffc)
                             Related Term (Associative): 
                        Lead (Metal) (Rbceffm)
                        Silicon (Rbceffs)
                        Tin (Rbcefft)
                    Group V elements (Rbcefg)
                        Nitrogen (Rbcefgn)
                            Liquid nitrogen (Rbcefgnc)
                        Phosphorus (Rbcefgp)
                    Group VI elements (Rbcefh)
                        Oxygen (Rbcefhm)
                            Ozone (Rbcefhmn)
                        Selenium (Rbcefhr)
                        Sulfur (Rbcefhs)
                             Use For: Sulphur
                    Group VII elements (Rbcefj)
                        Bromine (Rbcefjb)
                        Chlorine (Rbcefjc)
                        Fluorine (Rbcefjf)
                        Iodine (Rbcefjj)
                    Group 0 elements (Rbcefk)
                         Use For: Group 18 elements
                         Related Term (Associative): Noble gases (RBBFSJ)
                        Helium (Rbcefkh)
                        Radon (Rbcefkr)
                        Xenon (Rbcefkx)
                    Actinides (Rbcefm)
                        Plutonium (Rbcefmp)
                        Uranium (Rbcefmu)
            Chemical compounds (Rbcg)
                Chemical compounds by primary element or compound (Rbcgc)
                    Alkali metal compounds (Rbcgcb)
                    Aluminum compounds (Rbcgcc)
                    Ammonium compounds (Rbcgcd)
                    Calcium compounds (Rbcgce)
                    Carbonates (Rbcgcf)
                    Chlorine compounds (Rbcgcg)
                        Chlorides (Rbcgcgd)
                             Related Term (Associative): 
                    Halides (Rbcgch)
                    Hydrates (Rbcgcj)
                    Hydroxides (Rbcgck)
                    Iron compounds (Rbcgcm)
                    Lead compounds (Rbcgcn)
                    Lithium compounds (Rbcgcp)
                    Magnesium compounds (Rbcgcq)
                    Nitrogen compounds (Rbcgcr)
                        Nitrates (Rbcgcrc)
                        Nitrites (Rbcgcrf)
                    Oxides (Rbcgcs)
                    Phosphates (Rbcgct)
                    Silicon compounds (Rbcgcu)
                    Sodium compounds (Rbcgcv)
                    Sulfur compounds (Rbcgcw)
                         Use For: Sulphur compounds
                        Polysulfides (Rbcgcwc)
                             Use For: Polysulphides
                        Sulfates (Rbcgcwf)
                             Use For: Sulphates
                        Sulfides (Rbcgcwh)
                             Use For: Sulphides
                        Sulfites (Rbcgcwk)
                             Use For: Sulphites
                        Sulfonates (Rbcgcwn)
                             Use For: Sulphonates
                Inorganic compounds (Rbcgn)
                    Aluminum inorganic compounds (Rbcgnb)
                        Alumina (Rbcgnbd)
                        Aluminates (Rbcgnbm)
                        Aluminum oxide (Rbcgnbr)
                    Ammonia (Rbcgnc)
                    Calcium inorganic compounds (Rbcgne)
                        Calcium carbonate (Rbcgneb)
                        Calcium chloride (Rbcgned)
                        Calcium hydroxide (Rbcgneg)
                             Use For: Hydrated lime
                        Calcium nitrite (Rbcgnej)
                        Calcium oxide (Rbcgnem)
                             Use For: Lime; Quicklime
                        Calcium silicate (Rbcgnep)
                            Tricalcium silicate (Rbcgnepp)
                            Tobermorite (Rbcgnept)
                        Calcium sulfates (Rbcgner)
                        Tricalcium aluminate (Rbcgnet)
                    Carbon inorganic compounds (Rbcgnf)
                        Carbides (Rbcgnff)
                        Carbon dioxide (Rbcgnfm)
                             Related Term (Associative): 
                        Carbon monoxide (Rbcgnfq)
                             Related Term (Associative): 
                    Chlorites (Rbcgng)
                    Cyanides (Rbcgnh)
                    Fluorides (Rbcgnj)
                    Hydrogen inorganic compounds (Rbcgnk)
                        Hydrazine (Rbcgnkb)
                        Hydrides (Rbcgnkf)
                        Hydrochloric acid (Rbcgnkh)
                             Use For: Muriatic acid
                        Hydrogen peroxide (Rbcgnkp)
                             Use For: Peroxide
                        Hydrogen sulfide (Rbcgnkt)
                    Iron inorganic compounds (Rbcgnm)
                        Ferrites (Rbcgnmf)
                        Ferrous sulfide (Rbcgnmp)
                        Iron oxides (Rbcgnmt)
                    Lithium chloride (Rbcgnp)
                    Magnesium chloride (Rbcgnq)
                    Nitrogen inorganic compounds (Rbcgnr)
                        Inorganic nitrates (Rbcgnrd)
                        Nitric acid (Rbcgnrm)
                        Nitric oxide (Rbcgnrr)
                        Nitrogen oxides (Rbcgnru)
                             Related Term (Associative): Exhaust gas recirculation (Qpwe); Selective catalytic reduction (Qpws)
                            Nitrogen dioxide (Rbcgnrun)
                    Phosphorus inorganic compounds (Rbcgns)
                        Inorganic phosphates (Rbcgnsk)
                        Phosphoric acid (Rbcgnsp)
                    Potassium chloride (Rbcgnt)
                    Silicon inorganic compounds (Rbcgnu)
                        Silane (Rbcgnuc)
                        Silica gel (Rbcgnuf)
                        Silicates (Rbcgnuh)
                        Silicon carbide (Rbcgnum)
                        Silicon dioxide (Rbcgnup)
                        Silicon nitride (Rbcgnut)
                    Sodium inorganic compounds (Rbcgnv)
                        Sodium carbonate (Rbcgnvc)
                        Sodium chloride (Rbcgnvg)
                             Use For: Common salt; Table salt
                        Sodium hydroxide (Rbcgnvk)
                        Sodium silicate (Rbcgnvp)
                        Sodium sulfate (Rbcgnvs)
                    Sulfur inorganic compounds (Rbcgny)
                        Sulfur oxides (Rbcgnym)
                            Sulfur dioxide (Rbcgnymm)
                        Sulfuric acid (Rbcgnyt)
                    Uranium inorganic compounds (Rbcgnz)
                        Uranyl acetate (Rbcgnzm)
                             Use For: Uranium acetate
                Organic compounds (Rbcgr)
                    Groups of organic compounds (Rbcgrb)
                        Acetates (Rbcgrbb)
                        Alcohols (Rbcgrbc)
                            Carbinols (Rbcgrbcd)
                        Aldehydes (Rbcgrbd)
                        Aliphatic compounds (Rbcgrbe)
                        Amides (Rbcgrbf)
                        Amines (Rbcgrbg)
                        Carbohydrates (Rbcgrbj)
                        Chlorine organic compounds (Rbcgrbk)
                        Epoxides (Rbcgrbm)
                             Use For: Epoxies; Epoxy compounds
                        Esters (Rbcgrbn)
                        Ethers (Rbcgrbp)
                        Ethylenes (Rbcgrbq)
                             Use For: Ethene; Olefiant gas
                        Glycols (Rbcgrbr)
                        Halogenated compounds (Rbcgrbs)
                        Hydrocarbons (Rbcgrbt)
                            Alkanes (Rbcgrbta)
                            Aromatic hydrocarbons (Rbcgrbtb)
                                 Use For: Arenes; Aromatic compounds
                            Olefins (Rbcgrbtm)
                                 Use For: Alkenes
                            Polyvinyl hydrocarbons (Rbcgrbts)
                                 Use For: Alkynes
                        Ketones (Rbcgrbu)
                        Organometallic compounds (Rbcgrbv)
                        Polycarbonates (Rbcgrbw)
                        Styrenes (Rbcgrby)
                    Organic polymers (Rbcgro)
                    Individual organic compounds (Rbcgrr)
                        Acetic acid (Rbcgrrb)
                             Use For: Ethanolic acid
                        Benzene (Rbcgrrc)
                        Butadiene (Rbcgrrd)
                            Styrene butadiene styrene (Rbcgrrds)
                        Butane (Rbcgrre)
                        Calcium magnesium acetate (Rbcgrrf)
                             Use For: CMA
                        Carbene (Rbcgrrg)
                        Ethanol (Rbcgrrh)
                             Use For: Ethyl alcohol; Ethylalcohol
                        Ethylene glycol (Rbcgrrj)
                        Formaldehyde (Rbcgrrk)
                             Use For: Formol; Methanal; Methylene oxide
                        Methane (Rbcgrrl)
                             Use For: Methyl hydride
                        Methanol (Rbcgrrm)
                             Use For: Methyl alcohol; Wood alcohol
                        Methyl methacrylate (Rbcgrrn)
                        Phenol (Rbcgrro)
                             Use For: Carbolic acid; Phenylic acid
                        Polymethyl methacrylate (Rbcgrrp)
                        Polypropylene (Rbcgrrq)
                        Polystyrene (Rbcgrrr)
                             Use For: Geofoam
                        Polytetrafluoroethylene (Rbcgrrs)
                             Use For: PTFE; Teflon
                        Polyvinyl acetate (Rbcgrrt)
                             Use For: PVA
                        Polyvinyl chloride (Rbcgrru)
                             Use For: Polyvinylchloride; PVC
                        Tetraethyl lead (Rbcgrrv)
                             Use For: TEL
                        Toluene (Rbcgrrw)
                             Use For: Methylbenzene; Phenylmethane
                        Urea (Rbcgrrx)
                             Use For: Carbamide
                        Urethane (Rbcgrry)
                             Use For: Ethyl carbamate; Ethyl urethane
                Salts (Rbcgs)
                    Inorganic salts (Rbcgsn)
                    Organic salts (Rbcgsr)
                    Soluble salts (Rbcgss)
            Specialty chemicals (Rbcs)
            Chemical substances (Rbct)
                Accelerators (Materials) (Rbcta)
                Anodic materials (Rbctb)
                    Sacrificial anodes (Rbctbs)
                Catalysts (Rbctd)
                    Monolithic catalysts (Rbctdm)
                    Oxidation catalysts (Rbctdp)
                    Pelleted catalysts (Rbctds)
                Extenders (Rbctf)
                Flocculating agents (Rbctg)
                     Use For: Flocculants
                Flotation agents (Rbcth)
                Inhibitors (Chemistry) (Rbctk)
                    Antioxidants (Rbctkb)
                    Retarders (Chemistry) (Rbctkr)
                         Use For: Retardants
                        Retarders (Concrete) (Rbctkrc)
                Mixtures (Rbctm)
                     Related Term (Associative): Paving materials (Rbmuejp)
                    Additives (Rbctma)
                    Blends (Rbctmb)
                    Colloidal systems (Rbctmc)
                        Colloids (Rbctmcc)
                        Gels (Rbctmcg)
                    Dispersions (Chemistry) (Rbctmd)
                        Dispersers (Rbctmdd)
                             Use For: Chemical dispersants; Dispersants; Emulsifiers
                        Emulsions (Rbctmde)
                        Smoke (Rbctmdq)
                        Sprays (Materials) (Rbctmds)
                    Formulations (Rbctmf)
                    Solutions (Chemistry) (Rbctmq)
                        Dissolved gases (Rbctmqd)
                        Electrolytes (Rbctmqe)
                        Leachate (Rbctmqm)
                        Solvents (Rbctmqr)
                            Organic solvents (Rbctmqrb)
                    Suspensions (Chemistry) (Rbctms)
                        Aerosols (Rbctmsb)
                        Free water (Rbctmsf)
                        Slurry (Rbctmss)
                            Bentonite slurry (Rbctmssb)
                Oxidizing agents (Rbctp)
                     Use For: Oxidants
                    Photochemical oxidants (Rbctpp)
                Chemical substances by pH (Rbctr)
                    Acids (Rbctrb)
                    Bases (Chemistry) (Rbctrg)
                        Alkali (Rbctrgb)
                Polymers (Rbcts)
                    Copolymers (Rbctsf)
                Reagents (Rbctt)
                Tracers (Chemistry) (Rbctv)
                Wetting agents (Rbcty)
        Water (Rbd)
            Water phases (Rbdb)
                Ice (Rbdbf)
                     Related Term (Associative): Ice formations (Jbhyjj)
                Slush (Rbdbk)
                Snow (Rbdbn)
                Water vapor (Rbdbt)
            Water by salt content (Rbdm)
                Fresh water (Rbdmf)
                    Drinking water (Rbdmfd)
                         Use For: Potable water
                Seawater (Rbdms)
                     Use For: Ocean water; Saline water; Salt water; Sea water
        Natural earth crust materials (Rbe)
            Deposits (Geology) (Rbeb)
                Alluvium (Rbebb)
                     Use For: Alluvial deposits
                Colluvium (Rbebf)
                Lacustrine deposits (Rbebk)
                Lenses (Geology) (Rbebl)
                Marine deposits (Rbebm)
                Mineral deposits (Rbebn)
                Organic deposits (Rbebo)
                Talus (Rbebp)
                Till (Rbebq)
                     Use For: Boulder clay; Glacial till
                Moraines (Rbebr)
                Sediments (Rbebs)
                Volcanic deposits (Rbebv)
            Weathered earth crust materials (Rbed)
                Laterites (Rbedn)
            Parent materials (Rbep)
            Rocks (Rber)
                 Use For: Rock
                Lithologic composition (Rberb)
                    Rock core (Rberbc)
                    Pores (Geology) (Rberbp)
                        Pore space (Rberbps)
                             Use For: Pore volume
                Igneous rocks (Rberg)
                    Alkalic rock (Rbergb)
                    Basalt (Rbergc)
                         Related Term (Associative): 
                    Dolerite (Rbergd)
                    Gabbro (Rbergg)
                    Granite (Rbergn)
                    Porphyry (Rbergp)
                    Trap rock (Rbergt)
                    Volcanic rock (Rbergv)
                        Pumice (Rbergvp)
                Sedimentary rocks (Rberh)
                    Arenites (Rberhb)
                    Calcretes (Rberhc)
                    Chalks (Rberhd)
                    Cherts (Rberhf)
                    Clastic rocks (Rberhg)
                    Conglomerates (Geology) (Rberhh)
                    Dolomite (Rberhj)
                    Limestone (Rberhm)
                         Use For: Limerock
                    Mudstones (Rberhp)
                    Oil shales (Rberhr)
                    Sandstones (Rberht)
                    Shale (Rberhu)
                    Silica stone (Rberhv)
                    Siltstones (Rberhy)
                Metamorphic rocks (Rberm)
                    Gneiss (Rbermg)
                    Illites (Rbermj)
                    Marble (Rbermm)
                    Quartzite (Rbermq)
                    Schist (Rberms)
                    Slate (Rbermt)
                Ores (Rberp)
                    Bauxite (Rberpb)
                    Iron ores (Rberpr)
                Minerals (Rberr)
                    Amber (Rberra)
                    Asbestos (Rberrb)
                    Calcites (Rberrc)
                    Carbonate rocks (Rberrd)
                    Chromates (Rberre)
                    Clay minerals (Rberrf)
                        Bentonite (Rberrfb)
                             Use For: Bentonitic clay
                        Halloysite (Rberrfh)
                        Kaolin (Rberrfk)
                            Kaolinite (Rberrfkk)
                        Montmorillonite (Rberrfm)
                        Vermiculite (Rberrfv)
                    Diamonds (Rberrg)
                    Ettringite (Rberrh)
                         Use For: Woodfordite
                    Feldspar (Rberrj)
                    Flint (Rberrk)
                    Graphite (Rberrm)
                    Gypsum (Rberrn)
                    Halite (Rberrp)
                         Use For: Rock salt
                    Mica (Rberrq)
                    Phosphate rock (Rberrr)
                    Pyrite (Rberrs)
                    Quartz (Rberrt)
                        Rock crystals (Rberrtr)
                             Use For: Crystals
                            Prisms (Rberrtrp)
                    Silica (Rberrv)
                        Opals (Rberrvp)
                Coal (Rbers)
                    Anthracite (Rbersb)
                    Bituminous coal (Rbersd)
                    Lignite (Rbersm)
                         Use For: Brown coal; Earth coal
                    Subbituminous coal (Rberss)
                Rocks by properties (Rbert)
                    Bedrock (Rbertb)
                    Boulders (Rbertc)
                    Breccia (Rbertd)
                    Crystalline rocks (Rbertf)
                    Decomposed rock (Rberth)
                        Drift (Rberthi)
                    Fractured rock (Rbertj)
                    Manganese nodules (Rbertm)
                    Organic rocks (Rbertp)
                    Overburdens (Rbertq)
                    Soft rock (Rbertr)
                         Use For: Soft strata
                    Strata (Rberts)
                    Weak rock (Rbertt)
                    Weathered rock (Rbertw)
            Soils (Rbes)
                Soil components (Rbesb)
                    Soil air (Rbesbb)
                    Soil particles (Rbesbp)
                    Groundwater (Rbesbw)
                         Use For: GROUND WATER
                        Capillary water (Rbesbwc)
                        Phreatic water (Rbesbwp)
                        Soil water (Rbesbws)
                             Use For: Soil moisture
                        Vadose water (Rbesbwv)
                Soil series (Rbesc)
                Soil groups (Rbesf)
                    Cohesive soils (Rbesfc)
                    Granular soils (Rbesfg)
                         Use For: Cohesionless soils; Noncohesive soils
                Soil types (Rbesg)
                    Clay soils (Rbesgc)
                        Clay water systems (Rbesgcb)
                        Expansive clays (Rbesgce)
                             Related Term (Associative): Swelling soils (Rbespmv)
                        Marine clays (Rbesgcj)
                        Marl (Rbesgck)
                        Pozzolan (Rbesgcm)
                             Use For: Pozzuolana
                        Sandy clays (Rbesgcn)
                        Sensitive clays (Rbesgcp)
                        Silty clays (Rbesgcr)
                        Soft clays (Rbesgct)
                        Varved clays (Rbesgcv)
                    Cobbles (Rbesgd)
                    Gravel (Rbesgg)
                        Gravelly soils (Rbesggg)
                        Lateritic gravels (Rbesggk)
                        Sandy gravels (Rbesggs)
                    Sand (Rbesgs)
                        Asphaltic sand (Rbesgsb)
                             Use For: Sand asphalt
                        Beach sands (Rbesgsd)
                        Bituminous sands (Rbesgsf)
                        Dune sands (Rbesgsh)
                        Sand deposits (Rbesgsp)
                        Sandy soils (Rbesgsq)
                        Silica sands (Rbesgsr)
                        Silty sands (Rbesgss)
                        Tar sands (Rbesgst)
                    Silts (Rbesgt)
                        Loess (Rbesgtk)
                        Silty loams (Rbesgtm)
                Soil deposits (Rbesj)
                    Residual soils (Rbesjr)
                    Suspended sediments (Rbesjs)
                    Volcanic ash (Rbesjv)
                Soils by place (Rbesm)
                    Glacial soils (Rbesmg)
                    Lacustrine soils (Rbesmk)
                    Marine soils (Rbesmm)
                    Ocean bottom soils (Rbesmp)
                Soils by properties (Rbesp)
                    Soils by chemical content or action (Rbespb)
                        Acid soils (Rbespbb)
                        Calcareous soils (Rbespbc)
                            Black cotton soils (Rbespbcb)
                                 Use For: Regur
                        Corrosive soils (Rbespbd)
                        Lateritic soils (Rbespbj)
                        Limestone soils (Rbespbk)
                        Micaceous soils (Rbespbm)
                        Saline soils (Rbespbs)
                    Soils by consistency (Rbespc)
                        Plastic soils (Rbespcp)
                        Soft soils (Rbespcs)
                             Use For: Soft ground
                    Soils by density (Rbespd)
                        Dense soils (Rbespdd)
                        Loose soils (Rbespdm)
                    Soils by frost condition or potential (Rbespf)
                        Frost heaving soils (Rbespfd)
                        Frost susceptible soil (Rbespff)
                        Frozen soils (Rbespfh)
                             Use For: Frozen ground
                            Seasonally frozen ground (Rbespfhs)
                        Permafrost (Rbespfp)
                             Related Term (Associative): Frigid regions (Vcrf)
                    Soils by grain size and distribution (Rbespg)
                        Coarse grained soils (Rbespgc)
                        Fine grained soils (Rbespgf)
                        Homogeneous soils (Rbespgh)
                    Soil horizon (Rbesph)
                        Subsoil (Rbesphs)
                             Use For: Subsurface soils
                        Topsoil (Rbespht)
                            Turf (Rbesphtt)
                        Soil profiles (Rbesphy)
                    Soils by moisture content or potential (Rbespm)
                        Air dried soil (Rbespmb)
                        Mud (Rbespmm)
                        Saturated soils (Rbespms)
                             Use For: Soil saturation
                        Sludge (Deposit) (Rbespmt)
                        Swelling soils (Rbespmv)
                             Use For: Expansive soils
                             Related Term (Associative): Expansive clays (Rbesgce)
                        Unsaturated soils (Rbespmy)
                        Vertisols (Rbespmz)
                             Use For: Shrink swell soils
                    Soils by organic content (Rbespn)
                        Humus (Rbespnh)
                        Loam (Rbespnm)
                        Organic soils (Rbespnn)
                        Peat (Rbespnp)
                        Peat soils (Rbespnq)
                    Soils by permeability (Rbespp)
                        Impervious soils (Rbesppk)
                        Pervious soils (Rbesppp)
                    Soils by strength (Rbesps)
                        Collapsible soils (Rbespsc)
                        Compressible soils (Rbespsf)
                        Unstable soil (Rbespsu)
                    Soil structure (Rbespt)
                        Layered soils (Rbesptm)
                        Unconsolidated soils (Rbesptu)
            Petroleum (Rbeu)
                 Related Term (Associative): Petroleum fuels (Rbffp)
                Petroleum gases (Rbeug)
                    Natural gas (Rbeugn)
                Petroleum liquids (Rbeum)
                    Crude oil (Rbeumc)
                    Maltha (Rbeumm)
                         Use For: Earth pitch; Malthite
                Petroleum solids (Rbeus)
                    Asphalt (Rbeusb)
                        Asphalt rock (Rbeusbf)
                             Use For: Natural rock asphalt; Rock asphalt
                        Trinidad asphalt (Rbeusbt)
                             Use For: Lake asphalt
                    Bitumen (Rbeush)
                         Related Term (Associative): 
                    Tar (Rbeusp)
                         Use For: Mineral tar
                         Related Term (Associative): 
        Fuels (Rbf)
            Fuel composition (Rbfc)
                Fuel additives (Rbfcb)
                    Antiknock compounds (Rbfcbb)
                        Tetraethyl lead (Rbfcbbt)
                             Use For: TEL
                    Oxidizers (Rbfcbp)
                Fuel emulsions (Rbfce)
                Fuel mixtures (Rbfcm)
                     Use For: Fuel blends
            Alcohol fuels (Rbfd)
                Methanol fuels (Rbfdm)
            Biomass fuels (Rbfe)
                 Use For: Biofuels; Biogas
            Fossil fuels (Rbff)
                Coal fuels (Rbffe)
                    Coal gas (Rbffed)
                Petroleum fuels (Rbffp)
                     Related Term (Associative): Petroleum (Rbeu)
                    Kerosene (Rbffpk)
                         Use For: Kerosine
                    Natural gas (Rbffpn)
                        Compressed natural gas (Rbffpnc)
                        Liquefied natural gas (Rbffpnm)
                             Use For: LNG
                    Liquefied petroleum gas (Rbffpp)
                         Use For: LPG
            Hydrogen fuels (Rbfh)
                Liquid hydrogen (Rbfhm)
            Nuclear fuels (Rbfn)
                Spent reactor fuels (Rbfns)
                     Use For: Nuclear reactor wastes; Spent fuel elements; Spent fuels
            Fuels by properties (Rbfp)
                Alternate fuels (Rbfpb)
                     Use For: Alternative fuels
                Clean fuels (Rbfpc)
                Fuel air mixtures (Rbfpd)
                Fuel gas (Rbfpe)
                Fuel oils (Rbfpg)
                Lean fuel mixtures (Rbfpj)
                Liquid fuels (Rbfpm)
                Residual fuels (Rbfpr)
                Synthetic fuels (Rbfps)
                Unburned fuels (Rbfpu)
            Fuels by end use (Rbfu)
                Aviation fuels (Rbfub)
                    Aircraft fuels (Rbfubb)
                        Jet engine fuels (Rbfubbj)
                Gas turbine fuels (Rbfug)
                Motor fuels (Rbfum)
                     Use For: Automobile fuels; Automotive fuels
                    Diesel fuels (Rbfumd)
                        Biodiesel fuels (Rbfumdb)
                    Gasoline (Rbfumg)
                         Use For: Petrol
                        Gasohol (Rbfumgg)
                        Leaded gasoline (Rbfumgm)
                        Unleaded gasoline (Rbfumgu)
                             Use For: Lead free gasoline
                             Related Term (Associative): 
                        Reformulated gasoline (Rbfumgx)
                Spacecraft fuels (Rbfus)
                    Propellants (Rbfusp)
        Air (Rbj)
            Compressed air (Rbjc)
        Building materials (Rbm)
             Use For: Construction materials
             Related Term (Associative): Equipment (Qt)
            Building materials by properties (Rbmd)
                Engineering soils (Rbmdb)
                    Backfill soils (Rbmdbb)
                    Cement treated soils (Rbmdbc)
                        Soil cement (Rbmdbcs)
                             Related Term (Associative): Flowable fill (Pdxtff)
                    Compacted soils (Rbmdbe)
                        Compacted clays (Rbmdbec)
                    Drained soil (Rbmdbf)
                    Foundation soils (Rbmdbh)
                    Membrane encapsulated soil layers (Rbmdbi)
                         Use For: MESL
                    Mechanically stabilized earth (Rbmdbj)
                         Use For: Reinforced earth
                    Remolded soils (Rbmdbm)
                        Remolded clay soils (Rbmdbmc)
                    Soil lime mixtures (Rbmdbs)
                Aggregates, rock and stone (Rbmdd)
                    Aggregates (Rbmddc)
                         Related Term (Associative): Quarries (Pdweq)
                        Aggregates by source (Rbmddcc)
                            Artificial aggregates (Rbmddccb)
                                 Use For: Manufactured aggregates; Synthetic aggregates
                                Expanded clay aggregates (Rbmddccbe)
                                Expanded shale aggregates (Rbmddccbg)
                                Lightweight aggregates (Rbmddccbm)
                                Slag coarse aggregates (Rbmddccbs)
                            Natural aggregates (Rbmddccn)
                                Basalt coarse aggregates (Rbmddccnb)
                                Limestone aggregates (Rbmddccnm)
                                Mineral aggregates (Rbmddccnn)
                                Volcanic aggregates (Rbmddccnv)
                        Aggregates by gradation (Rbmddcf)
                            Continuously graded aggregates (Rbmddcfc)
                            Dense graded aggregates (Rbmddcfd)
                            Gap graded aggregates (Rbmddcfg)
                            Open graded aggregates (Rbmddcfp)
                        Aggregates by shape and surface texture (Rbmddcj)
                            Coarse aggregates (Rbmddcjc)
                                 Use For: Graded coarse aggregates
                            Fine aggregates (Rbmddcjf)
                                 Use For: Graded fine aggregates
                            Interlocking aggregates (Rbmddcjj)
                                 Use For: Aggregate interlock
                            Rounded aggregates (Rbmddcjr)
                        Aggregates by relationship to concrete (Rbmddcm)
                            Deleterious materials (Rbmddcmd)
                            Reactive aggregates (Rbmddcmr)
                        Aggregates by treatment (Rbmddcp)
                            Calcined aggregates (Rbmddcpc)
                            Crushed aggregates (Rbmddcpf)
                            Crusher run aggregates (Rbmddcpj)
                            Precoated aggregates (Rbmddcpp)
                        Aggregate mixtures (Rbmddcs)
                            Bituminous aggregates (Rbmddcsb)
                            Concrete aggregates (Rbmddcsc)
                            Soil aggregates (Rbmddcss)
                    Rock in building (Rbmddr)
                        Chippings (Rbmddrc)
                            Coated chippings (Rbmddrcc)
                        Crushed rock (Rbmddrj)
                            Crushed limestone (Rbmddrjm)
                    Stone (Rbmddt)
                        Paving stones (Rbmddtp)
                             Use For: Sett
                    Consolidated aggregates, rock and stone (Rbmddv)
                        Ballast (Railroads) (Rbmddvb)
                             Use For: Railroad ballast
                            Asphalt ballast (Rbmddvbb)
                            Subballast (Rbmddvbs)
                        Macadam (Rbmddvm)
                            Bituminous macadam (Rbmddvmb)
                                 Use For: Tarmacadam
                            Penetration macadam (Rbmddvmp)
                            Water bound macadam (Rbmddvmw)
                Ceramic materials (Rbmdf)
                     Use For: Ceramics
                     Related Term (Associative): 
                    Brick (Rbmdfb)
                    Cement (Rbmdfc)
                         Use For: Cementitious materials
                        Air entraining cement (Rbmdfcb)
                        Aluminous cement (Rbmdfcd)
                             Use For: Aluminate cement
                        Asbestos cement (Rbmdfcf)
                        Expansive cement (Rbmdfch)
                             Use For: Shrinkage compensating cement
                        Gypsum cement (Rbmdfcj)
                        High early strength cement (Rbmdfcm)
                        Hydraulic cement (Rbmdfcp)
                        Lime cement (Rbmdfcr)
                        Portland cement (Rbmdfct)
                            Portland pozzolan cement (Rbmdfctp)
                        Slag cement (Rbmdfcu)
                        Sulfate resisting cement (Rbmdfcx)
                             Use For: Sulphate resistant cement
                        Cement additives (Rbmdfcy)
                            Tobermorite (Rbmdfcyt)
                    Cermets (Rbmdfe)
                         Use For: Ceramels; Ceramets; Metal ceramics
                    Clay (Rbmdfk)
                        Expanded clay (Rbmdfke)
                        Vitrified clay (Rbmdfkv)
                    Glass (Rbmdfm)
                         Use For: Glazing materials
                        Glass beads (Rbmdfmb)
                             Use For: Glass shot
                        Safety glass (Rbmdfms)
                            Nonshattering glass (Rbmdfmsn)
                                 Use For: Laminated glass; Shatterproof glass
                            Tempered glass (Rbmdfmst)
                        Tinted glass (Rbmdfmu)
                             Related Term (Associative): 
                        Window glass (Rbmdfmw)
                    Plaster (Rbmdfp)
                    Stucco (Rbmdfs)
                Composite materials (Rbmdh)
                     Use For: Composites
                    Types of composites (Rbmdhb)
                        Fiber composites (Rbmdhbf)
                             Use For: Fiber reinforced composites
                            Fiberglass (Rbmdhbfg)
                        Concrete plastic composites (Rbmdhbp)
                    Concrete (Rbmdhc)
                         Related Term (Associative): 
                        Types of concrete (Rbmdhcb)
                            High strength concrete (Rbmdhcba)
                            Air entrained concrete (Rbmdhcbb)
                            Cast in place concrete (Rbmdhcbc)
                                 Use For: Cast in situ concrete
                            Cellular concrete (Rbmdhcbd)
                            Expansive concrete (Rbmdhcbe)
                                 Use For: Shrinkage compensating concrete
                            Fresh concrete (Rbmdhcbf)
                                 Use For: Green concrete; Plastic state concrete
                            High performance concrete (Rbmdhcbg)
                            Lean concrete (Rbmdhcbh)
                                Econocrete (Rbmdhcbhe)
                            Lightweight concrete (Rbmdhcbj)
                            Mass concrete (Rbmdhcbk)
                            Microconcrete (Rbmdhcbm)
                            Portland cement concrete (Rbmdhcbo)
                                 Use For: PCC (Concrete)
                            Precast concrete (Rbmdhcbp)
                                 Use For: Precast
                            Prestressed concrete (Rbmdhcbq)
                            Pumped concrete (Rbmdhcbr)
                                Shotcrete (Rbmdhcbrs)
                                     Use For: Gunite
                            Ready mixed concrete (Rbmdhcbs)
                            Reinforced concrete (Rbmdhcbt)
                                Confined concrete (Rbmdhcbtc)
                                     Related Term (Associative): Jacketing (Strengthening) (Fmbpj)
                                Tied concrete (Rbmdhcbtt)
                            Roller compacted concrete (Rbmdhcbu)
                            Self compacting concrete (Rbmdhcbv)
                                 Use For: Self consolidating concrete
                            Tremie concrete (Rbmdhcbw)
                                 Related Term (Associative): Underwater construction (Fceu)
                            Unreinforced concrete (Rbmdhcbx)
                                 Use For: Plain concrete
                            Ultra high performance concrete (Rbmdhcby)
                        Curing and setting agents (Rbmdhcj)
                            Air entraining agents (Rbmdhcjc)
                            Accelerating agents (Rbmdhcjf)
                                 Use For: Accelerators (Concrete)
                                 Related Term (Associative): 
                            Curing agents (Rbmdhcjj)
                                 Use For: Concrete curing materials
                            Retarders (Concrete) (Rbmdhcjr)
                            Water reducing agents (Rbmdhcjw)
                        Admixtures (Rbmdhcm)
                             Use For: Concrete admixtures; Concrete mixes; Concrete mixtures
                            Fiber reinforced concrete (Rbmdhcmg)
                                 Use For: Fibrous concrete
                                Glass fiber reinforced concrete (Rbmdhcmgf)
                            Polymer concrete (Rbmdhcmp)
                                 Use For: Plastic concrete
                                Geopolymer concrete (Rbmdhcmpg)
                                Latex modified concrete (Rbmdhcmpk)
                        Air voids (Rbmdhcu)
                            Entrained air (Rbmdhcuf)
                            Entrapped air (Rbmdhcur)
                        Water in concrete (Rbmdhcw)
                            Concrete mixing water (Rbmdhcwm)
                            Pore water (Rbmdhcwp)
                    Ferrocement (Rbmdhf)
                         Use For: Ferroconcrete
                Metals (Rbmdk)
                     Use For: Metal
                    Types of metals (Rbmdkb)
                        Base metal (Rbmdkbb)
                            Heat affected zone (Metals) (Rbmdkbbh)
                        Cast iron (Rbmdkbc)
                        Clad metals (Rbmdkbd)
                        Corrugated metals (Rbmdkbe)
                            Corrugated aluminum (Rbmdkbeb)
                            Corrugated steel (Rbmdkbes)
                        Die castings (Rbmdkbf)
                        Galvanized metals (Rbmdkbg)
                        Heavy metals (Rbmdkbh)
                        Light metals (Rbmdkbm)
                        Steel castings (Rbmdkbt)
                        Weld metal (Rbmdkbw)
                    Alloys (Rbmdkd)
                        Aluminum alloys (Rbmdkdb)
                        Copper alloys (Rbmdkdc)
                            Brass (Rbmdkdcb)
                        Iron alloys (Rbmdkdf)
                            Austenite (Rbmdkdfb)
                            Steel (Rbmdkdfs)
                                Steel by properties (Rbmdkdfsc)
                                    Alloy steel (Rbmdkdfscb)
                                         Use For: Steel alloys
                                    Carbon steel (Rbmdkdfscc)
                                        Low alloy steel (Rbmdkdfsccm)
                                            HY 80 steel (Rbmdkdfsccmh)
                                        Mild steel (Rbmdkdfsccp)
                                    Cast steel (Rbmdkdfscd)
                                    Corrosion resistant steel (Rbmdkdfscf)
                                        Stainless steel (Rbmdkdfscfs)
                                    High strength steel (Rbmdkdfscm)
                                        Dual phase steel (Rbmdkdfscmd)
                                    Weathering steel (Rbmdkdfscw)
                                Steel by end use (Rbmdkdfse)
                                    Rail steel (Rbmdkdfsef)
                                    Reinforcing steel (Rbmdkdfseh)
                                    Shipbuilding steel (Rbmdkdfsep)
                                    Structural steel (Rbmdkdfses)
                        Lithium alloys (Rbmdkdk)
                        Magnesium alloys (Rbmdkdm)
                        Nickel alloys (Rbmdkdn)
                        Silicon alloys (Rbmdkds)
                        Titanium alloys (Rbmdkdt)
                        Zinc alloys (Rbmdkdu)
                        Alloys by properties (Rbmdkdy)
                            Corrosion resistant alloys (Rbmdkdyc)
                            Wear resistant alloys (Rbmdkdyw)
                Organic materials (Rbmdm)
                    Animal materials (Rbmdmb)
                        Coral (Rbmdmbc)
                        Leather (Rbmdmbm)
                        Shells (Zoology) (Rbmdmbs)
                    Vegetable materials (Rbmdmv)
                        Bamboo (Rbmdmvc)
                        Burlap (Rbmdmve)
                        Compost (Rbmdmvf)
                        Lignin (Rbmdmvg)
                        Lignosulfonate (Rbmdmvj)
                        Mulches (Rbmdmvm)
                        Straw (Rbmdmvs)
                        Wood (Rbmdmvw)
                            Bark (Rbmdmvwb)
                            Cellulose (Rbmdmvwd)
                            Hardwoods (Rbmdmvwf)
                            Laminated wood (Rbmdmvwj)
                                 Use For: Glulam
                            Logs (Rbmdmvwm)
                            Lumber (Rbmdmvwp)
                            Plywood (Rbmdmvwr)
                            Soft woods (Rbmdmvws)
                            Timber (Rbmdmvwt)
                            Wood chips (Rbmdmvww)
                Hydrocarbon based materials (Rbmdp)
                    Asphalt based materials (Rbmdpb)
                        Asphalt cement (Rbmdpbb)
                             Use For: Bituminous cement
                        Emulsified asphalt (Rbmdpbe)
                            Anionic emulsified asphalt (Rbmdpbeb)
                            Cationic emulsified asphalt (Rbmdpbec)
                        Gussasphalt (Rbmdpbg)
                             Use For: Gussaphalt
                        Foamed asphalt (Rbmdpbh)
                        Liquid asphalt (Rbmdpbm)
                             Use For: Cutback asphalt
                        Rolled asphalt (Rbmdpbr)
                        Sheet asphalt (Rbmdpbs)
                        Asphalt mixtures (Rbmdpbu)
                             Use For: Asphaltic mixtures; Plant mix asphalt
                             Related Term (Associative): Mix design (Esmmm)
                            Asphalt concrete (Rbmdpbub)
                                 Use For: Asphaltic concrete; Bituminous concrete
                                Plant mix (Rbmdpbubp)
                            Mastic asphalt (Rbmdpbum)
                                 Use For: Asphalt mastic; Mastiphalt
                            Stone matrix asphalt (Rbmdpbuq)
                                 Use For: Stone mastic asphalt
                                 Related Term (Associative): 
                            Superpave (Rbmdpbus)
                                 Use For: Superior performing asphalt pavements
                        Asphalt additives (Rbmdpby)
                            Polymer asphalt (Rbmdpbyp)
                                 Use For: Polymer modified asphalt
                                Elastomer modified asphalt (Rbmdpbype)
                                    Latex asphalt (Rbmdpbypem)
                                    Asphalt rubber (Rbmdpbyper)
                                         Use For: Rubberized asphalt
                            Sulfur asphalt (Rbmdpbys)
                                 Use For: Sulphur asphalt
                    Bituminous materials (Rbmdpc)
                        Bituminous mixtures (Rbmdpcm)
                             Use For: Bituminous paving mixtures
                        Rubberized bitumen (Rbmdpcr)
                    Coal based materials (Rbmdpf)
                        Coal liquids (Rbmdpfc)
                        Coal tars (Rbmdpff)
                        Coke (Rbmdpfm)
                        Creosote (Rbmdpfp)
                    Maltha based materials (Rbmdpm)
                        Malthene (Rbmdpmm)
                             Use For: Petrolene
                    Petrochemicals (Rbmdpp)
                         Use For: Petroleum chemicals
                        Asphaltene (Rbmdppb)
                        Petroleum distillates (Rbmdppd)
                        Naphtha (Rbmdppf)
                        Paraffin (Rbmdppp)
                            Propane (Rbmdpppq)
                        Residual oils (Rbmdpps)
                    Hydrocarbon based materials from multiple sources (Rbmdpt)
                        Carbon black (Rbmdptc)
                        Pitch (Materials) (Rbmdptp)
                        Synthetic crude (Rbmdpts)
                             Use For: Synthetic petroleum
                        Synthetic crude oil (Rbmdptv)
                             Use For: Synthetic oil
                Plastics (Rbmdq)
                     Use For: Plastic materials; Polymeric materials
                    Formed plastics (Rbmdqb)
                        Corrugated plastic (Rbmdqbc)
                        Expanded plastics (Rbmdqbe)
                        Laminated plastics (Rbmdqbm)
                    Elastomers (Rbmdqd)
                        Latex (Rbmdqdm)
                        Rubber (Rbmdqdr)
                            Rubber compounds (Rbmdqdrc)
                                Asphalt rubber (Rbmdqdrcb)
                                Chlorinated rubber (Rbmdqdrcc)
                                Styrene butadiene rubber (Rbmdqdrcs)
                            Natural rubber (Rbmdqdrk)
                            Neoprene (Rbmdqdrn)
                            Reclaimed rubber (Rbmdqdrr)
                            Synthetic rubber (Rbmdqdrs)
                    Nylon (Rbmdqn)
                    Phenolic plastic (Rbmdqp)
                    Reinforced plastics (Rbmdqq)
                        Fiber reinforced plastics (Rbmdqqf)
                            Glass fiber reinforced plastics (Rbmdqqfg)
                                 Use For: Fiberglass reinforced plastics; Glass reinforced plastics
                    Resins (Rbmdqr)
                        Acrylic resins (Rbmdqrb)
                        Alkyd resins (Rbmdqrd)
                        Epoxy resins (Rbmdqrf)
                        Ethylene resins (Rbmdqrh)
                             Use For: Polyethylene resins
                        Natural resins (Rbmdqrj)
                        Phenolic resins (Rbmdqrm)
                        Polyamide resins (Rbmdqrn)
                        Polyester resins (Rbmdqrp)
                             Use For: Polyesters
                        Polyurethane resins (Rbmdqrq)
                             Use For: Polyurethanes
                        Synthetic resins (Rbmdqrr)
                        Thermoplastic resins (Rbmdqrs)
                        Thermosetting resins (Rbmdqru)
                        Vinyl resins (Rbmdqrv)
                    Silicones (Rbmdqs)
                    Thermoplastic materials (Rbmdqt)
                         Use For: Thermoplastics; Thermoplasts
                    Thermosetting materials (Rbmdqu)
                         Use For: Thermosets
                Hazardous materials (Rbmds)
                     Use For: Dangerous goods; Hazardous substances
                     Related Term (Associative): 
                    Carcinogens (Rbmdsb)
                         Related Term (Associative): Cancer (Hmdf)
                    Hazardous chemicals (Rbmdsc)
                        Chemical agents (Rbmdscc)
                             Related Term (Associative): Biological and chemical weapons (Qtpymb)
                        Corrosive materials (Rbmdscm)
                    Explosives (Rbmdse)
                         Related Term (Associative): Explosives detectors (Dmgdre); Bombs (Qtpyb)
                        Plastic explosives (Rbmdsep)
                    Flammable materials (Rbmdsf)
                         Use For: Inflammable materials
                        Flammable liquids (Rbmdsfm)
                    Poisons (Rbmdsp)
                         Use For: Toxic agents; Toxic materials; Toxicants
                         Related Term (Associative): Poisoning (Hme); Biological and chemical weapons (Qtpymb); Toxicology (Tphst)
                        Poisonous gases (Rbmdspg)
                    Radioactive materials (Rbmdsr)
                         Use For: Nuclear materials
                        Fallout (Rbmdsrf)
                Waste products (Rbmdu)
                     Use For: Byproducts; Reclaimed materials; Residues
                     Related Term (Associative): Recycling (Jfkyr)
                    Bottom ash (Rbmdua)
                    Clinkers (Rbmdub)
                    Crumb rubber (Rbmduc)
                    Dredged materials (Rbmdud)
                         Use For: Dredging spoil
                         Related Term (Associative): Dredging (Fcfxeud); Spoil (Jfkbt)
                    Combustion deposits (Rbmdue)
                    Dust (Rbmduf)
                        Kiln dust (Rbmdufk)
                             Related Term (Associative): Cement kilns (Qtpmhpb)
                        Limestone dust (Rbmdufm)
                        Sawdust (Rbmdufs)
                    Fly ash (Rbmduh)
                         Use For: Fuel ash; Incinerator residue
                        Lime fly ash (Rbmduhm)
                        Pulverized fly ash (Rbmduhp)
                    Foundry sand (Rbmduj)
                    Recycled materials (Rbmdum)
                         Use For: Recycled asphalt pavement; Recycled asphalt pavements
                    Rubble (Rbmdup)
                    Scrap (Rbmdur)
                        Scrap metal (Rbmdurs)
                    Silica fume (Rbmdut)
                         Use For: Microsilica
                    Slag (Rbmduv)
                         Use For: Blast Furnace Slag; Cinders
                        Granulated slag (Rbmduvg)
                             Use For: Ground slag; Precrushed slag
                        Pelletized slag (Rbmduvp)
                    Tailings (Rbmduw)
                    Wood waste (Rbmduy)
                Materials by shape or form (Rbmdx)
                     Related Term (Associative): Structural members (Pbpb)
                    Bars (Building materials) (Rbmdxa)
                         Related Term (Associative): 
                        Tendons (Materials) (Rbmdxam)
                        Reinforcing bars (Rbmdxar)
                             Use For: Rebar
                            Deformed bars (Rbmdxard)
                            Stirrups (Rbmdxars)
                        Rods (Rbmdxas)
                        Tie bars (Rbmdxat)
                             Use For: Joint bars
                    Blocks (Rbmdxb)
                        Concrete blocks (Rbmdxbc)
                             Use For: Block pavers
                            Monoliths (Rbmdxbcm)
                    Fabrics (Rbmdxc)
                        Ballast mats (Rbmdxcb)
                        Filters (Rbmdxcc)
                            Filter fabric (Rbmdxccf)
                        Geosynthetics (Rbmdxce)
                            Geogrids (Rbmdxceg)
                            Geomembranes (Rbmdxcem)
                            Geotextiles (Rbmdxcet)
                        Impervious membranes (Rbmdxch)
                        Nonwoven materials (Rbmdxcn)
                            Nonwoven textiles (Rbmdxcnt)
                        Rayon (Rbmdxcp)
                        Screens (Rbmdxcq)
                        Steel wire fabrics (Rbmdxcs)
                        Textiles (Rbmdxct)
                            Textile fabrics (Rbmdxctf)
                        Welded wire fabrics (Rbmdxcw)
                        Woven materials (Rbmdxcx)
                            Woven fabrics (Rbmdxcxf)
                    Fibers (Rbmdxf)
                         Use For: Fibres
                        Aramid fibers (Rbmdxfb)
                        Carbon fibers (Rbmdxfc)
                        Glass fibers (Rbmdxfg)
                        Metal fibers (Rbmdxfm)
                        Optical fibers (Rbmdxfo)
                        Polymer fibers (Rbmdxfp)
                        Steel fibers (Rbmdxfs)
                        Synthetic fibers (Rbmdxft)
                        Vulcanized fibers (Rbmdxfv)
                    Particles (Rbmdxm)
                        Fines (Materials) (Rbmdxmf)
                        Granular materials (Rbmdxmg)
                        Particulates (Rbmdxmm)
                        Pellets (Rbmdxmp)
                        Powders (Rbmdxms)
                        Screenings (Rbmdxmv)
                    Pipe and tubing (Rbmdxn)
                        Pipe (Rbmdxnp)
                             Use For: Pipes; Piping
                            Concrete pipe (Rbmdxnpc)
                                Reinforced concrete pipe (Rbmdxnpcr)
                            Corrugated pipe (Rbmdxnpe)
                            Culvert pipe (Rbmdxnpg)
                            Cured in place pipe (Rbmdxnph)
                                 Related Term (Associative): Linings (Rbmnu)
                            Drain pipe (Rbmdxnpj)
                                Traps (Drain pipe) (Rbmdxnpjt)
                            Metal pipe (Rbmdxnpk)
                                Steel pipe (Rbmdxnpks)
                            Perforated pipe (Rbmdxnpm)
                            Plastic pipe (Rbmdxnpp)
                            Riser pipe (Rbmdxnpr)
                            Sewer pipe (Rbmdxnps)
                            Water pipe (Rbmdxnpw)
                        Tubing (Rbmdxnt)
                             Use For: Tubes
                    Rope, wire and cable (Rbmdxq)
                        Cables (Rbmdxqc)
                             Related Term (Associative): Mooring cables (Qtpur)
                            Suspension cables (Rbmdxqcs)
                        Rope (Rbmdxqr)
                            Synthetic rope (Rbmdxqrs)
                            Wire rope (Rbmdxqrw)
                                 Related Term (Associative): Cable railroads (Nbbcgp); Aerial tramways (Pbcud)
                        Wire (Rbmdxqw)
                            Electric wire (Rbmdxqwe)
                            Filaments (Rbmdxqwg)
                            Long span (Rbmdxqwm)
                            Steel wire (Rbmdxqws)
                    Sheets and plates (Rbmdxs)
                        Diaphragms (Engineering) (Rbmdxsd)
                        Laminates (Rbmdxsm)
                             Use For: Laminated materials
                            Bimetals (Rbmdxsmb)
                                 Use For: Laminated metals
                        Paper (Rbmdxsn)
                        Particle board (Rbmdxsp)
                        Plates (Engineering) (Rbmdxsq)
                            Anchor plates (Rbmdxsqc)
                            Bolsters (Rbmdxsqe)
                            Gusset plates (Rbmdxsqg)
                            Orthotropic plates (Rbmdxsqj)
                            Plate metal (Rbmdxsqm)
                            Platens (Rbmdxsqp)
                            Splice plates (Rbmdxsqq)
                            Steel plates (Rbmdxsqr)
                            Stiffened plates (Rbmdxsqs)
                            Stiffeners (Plates) (Rbmdxsqt)
                                Longitudinal stiffeners (Rbmdxsqtm)
                                Transverse stiffeners (Rbmdxsqtt)
                            Thin plates (Rbmdxsqx)
                            Welded plates (Rbmdxsqy)
                        Sheathing (Rbmdxsr)
                             Use For: Sheeting
                        Sheets (Rbmdxss)
                            Foil (Rbmdxssb)
                            Panels (Rbmdxssd)
                            Separators (Rbmdxssf)
                                Raised separators (Rbmdxssfr)
                            Sheet metal (Rbmdxssm)
                            Strip metal (Rbmdxssn)
                            Sheet molding compounds (Rbmdxssp)
                            Steel sheets (Rbmdxsss)
                        Siding (Rbmdxst)
                             Use For: Weatherboarding
                    Materials by surface characteristics (Rbmdxt)
                        Coarse grained materials (Rbmdxtb)
                        Coated materials (Rbmdxtf)
                            Cold coated materials (Rbmdxtfc)
                            Hot coated materials (Rbmdxtfh)
                    Tile and shingles (Rbmdxu)
                        Shingles (Rbmdxus)
                        Tile (Rbmdxut)
                            Drain tile (Rbmdxutd)
                    Webbing (Rbmdxw)
                         Use For: Webs (Structural)
                        Wire mesh (Rbmdxwm)
                Materials by chemical properties, composition & structure (Rbmdy)
                    Materials by direction of measurement properties (Rbmdyb)
                        Anisotropic materials (Rbmdybb)
                             Use For: Aeolotropic materials
                        Isotropic materials (Rbmdybj)
                    Cylindrical bodies (Rbmdyc)
                    Elastic bodies (Rbmdye)
                        Viscoelastic materials (Rbmdyev)
                    Expanded materials (Rbmdyf)
                    Extrudates (Rbmdyg)
                    Foams and emulsions (Rbmdyh)
                        Emulsions (Rbmdyhe)
                            Asphalt emulsions (Rbmdyheb)
                                 Use For: Asphalt emulsion mixtures
                        Foams (Rbmdyhf)
                            Foamed materials (Rbmdyhfb)
                            Foaming agents (Rbmdyhff)
                            High expansion foams (Rbmdyhfh)
                            Plastic foams (Rbmdyhfp)
                            Polyurethane foams (Rbmdyhfr)
                    Impurities (Rbmdyj)
                    Oils (Rbmdyk)
                        Engine oils (Rbmdyke)
                             Use For: Motor oil
                        Flux oil (Rbmdykf)
                             Related Term (Associative): 
                        Heavy oils (Rbmdykg)
                        Lubricating oils (Rbmdykj)
                        Mineral oils (Rbmdykm)
                        Multigrade oils (Rbmdykp)
                        Oil additives (Rbmdykr)
                        Shale oil (Rbmdykt)
                        Vegetable oils (Rbmdykv)
                             Related Term (Associative): 
                            Linseed oil (Rbmdykvh)
                    Materials by strength or resistance to chemical action (Rbmdys)
                        Chemical resistant materials (Rbmdysb)
                        Cohesionless materials (Rbmdysc)
                        Corrosion resistant materials (Rbmdyse)
                             Use For: Corrosion inhibitors
                        Fiber reinforced materials (Rbmdysg)
                            Fiber reinforced polymers (Rbmdysgf)
                                 Related Term (Associative): 
                        Hard materials (Rbmdysh)
                        High strength materials (Rbmdysj)
                        Impervious materials (Rbmdysm)
                        Stabilized materials (Rbmdyss)
                             Use For: Stabilised materials
                    Materials at high or low temperatures (Rbmdyt)
                        Calcines (Rbmdytc)
                        Cryogenic materials (Rbmdytf)
                        Heat resistant materials (Rbmdyth)
                        Low temperature materials (Rbmdytm)
                        Refractory materials (Rbmdytr)
                    Materials by weight (Rbmdyw)
                        Lightweight materials (Rbmdywm)
            Materials by function (Rbmn)
                Abrasives (Rbmnb)
                    Grits (Rbmnbg)
                Adhesives (Rbmnd)
                    Adhesive tape (Rbmnda)
                         Use For: Tape (Adhesives)
                    Binders (Rbmndb)
                        Antistrip additives (Rbmndbc)
                        Bituminous binders (Rbmndbh)
                        Hydraulic binders (Rbmndbq)
                    Fluxes (Rbmndc)
                         Use For: Welding fluxes
                    Glue (Rbmndd)
                    Grout (Rbmndf)
                        Cement grouts (Rbmndfc)
                        Chemical grouts (Rbmndfd)
                    Mortar (Rbmndj)
                         Related Term (Associative): 
                        Cement mortars (Rbmndjc)
                        Patching mortar (Rbmndjp)
                    Pastes (Rbmndn)
                        Cement paste (Rbmndnc)
                             Related Term (Associative): 
                    Solder (Rbmnds)
                Cleansers (Rbmne)
                     Use For: Cleaning agents; Cleaning compounds
                    Detergents (Rbmned)
                    Disinfectants (Rbmnef)
                    Soap (Rbmnes)
                Coatings, fillers and paints (Rbmnf)
                    Coatings (Rbmnfc)
                         Related Term (Associative): 
                        Abrasion resistant coatings (Rbmnfcb)
                        Aluminum coatings (Rbmnfcc)
                        Anticorrosion coatings (Rbmnfcf)
                        Antifouling coatings (Rbmnfch)
                             Use For: Fouling prevention
                        Bituminous coatings (Rbmnfcj)
                        Ceramic coatings (Rbmnfcm)
                        Films (Coatings) (Rbmnfcp)
                            Thin films (Rbmnfcpt)
                        Metal coatings (Rbmnfcr)
                        Organic coatings (Rbmnfcs)
                        Plastic coatings (Rbmnfcu)
                            Epoxy coatings (Rbmnfcue)
                            Rubber coatings (Rbmnfcur)
                        Protective coatings (Rbmnfcv)
                        Toxic coatings (Rbmnfcw)
                        Zinc coatings (Rbmnfcx)
                    Fillers (Materials) (Rbmnfd)
                        Joint fillers (Rbmnfdj)
                        Limestone fillers (Rbmnfdk)
                        Mineral fillers (Rbmnfdm)
                    Finishes (Rbmnff)
                        Facings (Rbmnffe)
                    Moisture barriers (Rbmnfj)
                         Use For: Impervious surfaces
                         Related Term (Associative): Waterproofing (Fccmww); Moisture damage (Jbym)
                    Paint (Rbmnfn)
                        Aluminum paint (Rbmnfnb)
                        Enamels (Rbmnfne)
                        Lead based paint (Rbmnfnk)
                        Pigments (Rbmnfnp)
                        Reflectorized paint (Rbmnfnr)
                        Tack coats (Rbmnfns)
                             Related Term (Associative): 
                        Traffic paint (Rbmnfnt)
                        Underwater paint (Rbmnfnu)
                        Zinc rich paint (Rbmnfny)
                    Penetrants (Rbmnfp)
                    Plugs (Fillers) (Rbmnfq)
                    Primers (Materials) (Rbmnfr)
                         Use For: Paint primers
                    Sealing compounds (Rbmnfs)
                         Use For: Sealants; Sealers
                        Chip seals (Rbmnfsc)
                             Related Term (Associative): ; Surface treating (Fccu)
                        Joint sealers (Rbmnfsj)
                        Slurry seals (Rbmnfss)
                    Varnish (Rbmnfu)
                    Waterproofing materials (Rbmnfv)
                        Flashing (Rbmnfvf)
                        Water repellents (Rbmnfvr)
                             Use For: Water repellants
                    Waxes (Rbmnfw)
                    Wood preservatives (Rbmnfx)
                Colorants (Rbmng)
                    Dyes (Rbmngd)
                    Ink (Rbmngj)
                    Marking materials (Rbmngm)
                Coolants (Rbmnh)
                    Antifreeze (Rbmnhb)
                    Brines (Rbmnhd)
                    Cooling water (Rbmnhf)
                    Nuclear reactor coolants (Rbmnhn)
                    Refrigerants (Rbmnhr)
                Cushioning materials (Rbmni)
                    Energy absorbing materials (Rbmnie)
                Deicing chemicals (Rbmnj)
                     Use For: Chemical deicing agents; Deicing salt; Snow melters
                     Related Term (Associative): 
                    Calcium chloride (Rbmnjc)
                    Calcium magnesium acetate (Rbmnjf)
                         Use For: CMA
                    Sodium chloride (Rbmnjs)
                         Use For: Common salt; Table salt
                Fasteners (Rbmnk)
                     Related Term (Associative): Securing and joining equipment (Qtpu)
                    Bolts (Rbmnkb)
                        Anchor bolts (Rbmnkbb)
                             Use For: Anchor rods
                        Rockbolts (Rbmnkbr)
                    Chains (Rbmnkc)
                    Cotters (Rbmnkd)
                        Cotter pins (Rbmnkdp)
                    Dowels (Fasteners) (Rbmnkf)
                    Fastenings (Rbmnkh)
                         Related Term (Associative): 
                    Locks (Fasteners) (Rbmnki)
                         Related Term (Associative): Door latches (Qpbce)
                    Hinges (Rbmnkk)
                    Lugs (Rbmnkl)
                    Nails (Rbmnkm)
                    Nuts (Fasteners) (Rbmnkn)
                    Pins (Rbmnkp)
                    Rivets (Rbmnkr)
                    Screws (Rbmnks)
                    Spikes (Rbmnkt)
                    Stud connectors (Rbmnkv)
                         Use For: Connectors (Fasteners)
                Materials by flammability (Rbmnm)
                    Fire resistant coatings (Rbmnmc)
                    Fire extinguishing agents (Rbmnme)
                    Nonflammable materials (Rbmnmn)
                    Fireproof materials (Rbmnmp)
                    Fire retardants (Rbmnmr)
                    Fire resistant materials (Rbmnms)
                    Flammable materials (Rbmnmy)
                         Use For: Inflammable materials
                Friction materials (Rbmnn)
                    Grease (Rbmnng)
                    Lubricants (Rbmnnm)
                    Surface active agents (Rbmnns)
                         Use For: Surfactants
                Insulating materials (Rbmnt)
                    Acoustic materials (Rbmntb)
                        Sound insulating materials (Rbmntbs)
                    Electric insulating materials (Rbmnte)
                        Dielectric materials (Rbmnted)
                             Use For: Dielectrics
                    Heat insulating materials (Rbmnth)
                         Use For: Thermal insulation
                        Insulation blankets (Rbmnthb)
                Linings (Rbmnu)
                     Related Term (Associative): Cured in place pipe (Rbmdxnph)
                Plasticizers (Rbmnv)
                    Superplasticizers (Rbmnvp)
                Sorbents (Rbmnx)
                    Oil sorbents (Rbmnxb)
                    Absorbents (Rbmnxe)
                         Use For: Absorbers (Materials)
                        Driers (Materials) (Rbmnxed)
                        Porous materials (Rbmnxep)
                    Adsorbents (Rbmnxg)
                Wedges (Rbmny)
            Materials by end use (Rbmu)
                Structural materials (Rbmue)
                    Bearing materials (Rbmueb)
                    Reinforcing materials (Rbmued)
                    Materials in specific structural applications (Rbmuej)
                        Paving materials (Rbmuejp)
                             Related Term (Associative): Mixtures (Rbctm)
                            Cold mix paving mixtures (Rbmuejpc)
                                 Related Term (Associative): 
                            Warm mix paving mixtures (Rbmuejpf)
                            Hot mix asphalt (Rbmuejph)
                                 Use For: HMA; HMPA; Hot mix asphalt mixtures; Hot mix paving mixtures
                            Subbase materials (Rbmuejps)
                            Subgrade materials (Rbmuejpt)
                                 Use For: Bedding materials; Roadbed materials
                Electronic materials (Rbmuh)
                    Ferroelectric materials (Rbmuhf)
                        Piezoelectric materials (Rbmuhfp)
                    Magnetic materials (Rbmuhk)
                        Ferromagnetic materials (Rbmuhkf)
                    Microelectronic materials (Rbmuhm)
                        Nanostructured materials (Rbmuhmn)
                             Use For: Nanomaterials
                    Optoelectronic materials (Rbmuhp)
                    Thermoelectric materials (Rbmuht)
                    Electronic materials by conductivity (Rbmuhv)
                        Semiconductors (Rbmuhvg)
                            Superlattices (Rbmuhvgs)
                            Transistor materials (Rbmuhvgt)
                        Conducting materials (Rbmuhvm)
                            Photoconducting materials (Rbmuhvmp)
                        Superconductors (Rbmuhvs)
                            Composite superconductors (Rbmuhvsc)
                Optical materials (Rbmuj)
                    Electrooptic materials (Rbmuje)
                    Fiberoptic materials (Rbmujf)
                    Holographic materials (Rbmujh)
                    Laser materials (Rbmujm)
                    Luminous materials (Rbmujp)
                    Optical fibers (Rbmujr)
                    Photographic materials (Rbmuju)
                    Reflectorized materials (Rbmujv)
                         Use For: Reflectors
                        Retroreflectors (Rbmujvr)
                    Refractive materials (Rbmujx)
                        Photorefractive materials (Rbmujxp)
                Industrial materials (Rbmum)
                    Raw materials (Rbmumr)
                    Strategic materials (Rbmums)
                    Materials in specific industries (Rbmumt)
                        Agricultural chemicals (Rbmumtc)
                            Fertilizers (Rbmumtcf)
                            Herbicides (Rbmumtcg)
                            Insecticides (Rbmumtcj)
                                Nicotine (Rbmumtcjn)
                            Pesticides (Rbmumtcp)
                            Soil sterilants (Rbmumtcs)
                        Biological materials (Rbmumtd)
                             Related Term (Associative): Biological and chemical weapons (Qtpymb)
                        Biomedical materials (Rbmumte)
                        Drilling fluids (Rbmumtg)
                        Packaging materials (Rbmumtp)
                        Transportation materials (Rbmumtt)
                            Aerospace materials (Rbmumttb)
                            Road materials (Rbmumtth)
                                 Use For: Highway materials; Roadbuilding materials
                                Road marking materials (Rbmumtths)
                                    Striping materials (Rbmumtthss)
                                    Road marking tapes (Rbmumtthsu)
                            Railroad materials (Rbmumttr)
                                Rail fasteners (Rbmumttrf)
                Engine materials (Rbmur)
                    Engine oils (Rbmure)
                         Use For: Motor oil
                    Working fluids (Rbmurw)
                        Steam (Rbmurws)
                Vehicular materials (Rbmuv)
                    Aircraft materials (Rbmuvb)
                    Automotive materials (Rbmuvc)
                    Shipbuilding materials (Rbmuvs)
                    Spacecraft materials (Rbmuvt)
                        Ablative materials (Rbmuvtb)
            Engineered materials (Rbmv)
                Smart materials (Rbmvs)
                     Use For: Intelligent materials
                Synthetics (Rbmvw)
            Materials by source (Rbmy)
                Local materials (Rbmym)
    Properties of materials (Rk)
         Use For: Engineering properties
        Acoustic properties (Rkb)
            Acoustic impedance (Rkbf)
            Acoustic signature (Rkbj)
            Damping capacity (Rkbn)
            Loudness (Rkbq)
        Chemical properties (Rkc)
            Aliphaticity (Rkca)
            Chemical composition (Rkcb)
                 Use For: Chemical structure
                Chemical composition by material content (Rkcbb)
                    Air content (Rkcbba)
                    Ash content (Rkcbbb)
                    Asphalt content (Rkcbbg)
                    Binder content (Rkcbbj)
                    Cement content (Rkcbbm)
                        Cement factor (Rkcbbmf)
                    Chloride content (Rkcbbn)
                    Chlorine content (Rkcbbq)
                    Organic content (Rkcbbt)
                Heterogeneity (Rkcbf)
                Homogeneity (Rkcbh)
                Salinity (Rkcbs)
            Aromaticity (Rkcc)
            Chemical reactivity (Rkcf)
                 Use For: Reactivity
                Biodegradability (Rkcfb)
                Boiling point (Rkcff)
                Bond strength (Chemistry) (Rkcfj)
                Corrosion resistance (Rkcfn)
                     Use For: Stainless
                Instability (Rkcfp)
                Stability (Chemistry) (Rkcfr)
                Stoichiometry (Rkcfu)
                Volatility (Rkcfv)
                Weather resistance (Rkcfw)
            Combustion efficiency (Rkcg)
            Concentration (Chemistry) (Rkch)
                 Related Term (Associative): 
            Drag factor (Chemistry) (Rkcj)
            Flammability (Rkcm)
                Cetane number (Rkcmc)
                Fire resistance (Rkcmk)
                Flash point (Rkcms)
            Octane number (Rkco)
            pH value (Rkcp)
                Acidity (Rkcpf)
                Alkalinity (Rkcpr)
            Polymorphism (Chemistry) (Rkcq)
                 Use For: Allotropism; Polytypism
            Solubility (Rkcs)
            Thixotropy (Rkct)
            Toxicity (Rkcv)
            Turbidity (Rkcx)
        Electrical properties (Rke)
             Use For: Electric properties
            Capacitance (Rkec)
            Dielectric properties (Rked)
                 Use For: Dielectric constant
            Electrical conductivity (Rkef)
                Photoconductivity (Rkefp)
                Superconductivity (Rkefs)
            Electrical impedance (Rkeg)
                 Use For: Impedance (Electricity)
            Electrical resistivity (Rkeh)
                 Use For: Resistivity (Electricity)
                Skin resistance (Rkehs)
                     Use For: Frictional resistance
            Inductance (Rkek)
            Peak value (Electricity) (Rkeo)
            Power factor (Electricity) (Rkep)
            Power level (Electricity) (Rkeq)
            Refractivity (Rker)
                 Use For: Index of refraction
            Transfer characteristics (Rket)
        Electromagnetic properties (Rkf)
            Bandwidth (Rkfb)
            Electromagnetic compatibility (Rkfe)
            Frequency response (Rkfg)
            Magnetic properties (Rkfn)
                 Use For: Magnetism
                Magnetic induction (Rkfng)
            Transmittance (Electromagnetism) (Rkft)
        Mechanical properties (Rkm)
            Strength of materials (Rkma)
                 Use For: Strength (Materials); Strength (Mechanics)
                Adhesive strength (Rkmaa)
                Bond strength (Materials) (Rkmab)
                    Weld strength (Rkmabw)
                         Related Term (Associative): Welds (Pbpbx)
                Cohesive strength (Rkmac)
                Collapse strength (Rkmad)
                Compressive strength (Rkmae)
                     Use For: Compression strength
                Cyclic strength (Rkmaf)
                Fatigue strength (Rkmag)
                Field strength (Rkmah)
                Flexural strength (Rkmaj)
                     Use For: Bending strength; Flexural properties
                High strength (Rkmak)
                Longitudinal strength (Rkmal)
                Residual strength (Rkmam)
                Shear strength (Rkmar)
                     Use For: Shear resistance; Shearing strength
                    Residual shear strength (Rkmarr)
                    Undrained shear strength (Rkmaru)
                Tear strength (Rkmas)
                Tensile strength (Rkmat)
                Torsional strength (Rkmau)
                Transverse strength (Rkmav)
                Ultimate strength (Rkmaw)
                Undrained strength (Rkmax)
                     Use For: Wet strength
                Yield strength (Rkmay)
            Bearing capacity (Rkmb)
                 Use For: Bearing strength; Load bearing capacity
                Load limits (Rkmbm)
                Trafficability (Rkmbt)
            Collapse properties (Rkmc)
            Compressibility (Rkmd)
            Dilatancy (Rkme)
            Durability (Rkmf)
                 Use For: Wear resistance
            Eccentricity (Rkmg)
            Elasticity (Mechanics) (Rkmh)
                 Use For: Elastic properties
                 Related Term (Associative): 
                Consistency (Rkmhc)
                Hydroelasticity (Rkmhh)
                Linear elasticity (Rkmhm)
                Orthotropic (Rkmhn)
                Photoelasticity (Rkmhp)
                Thermoelasticity (Rkmht)
                Viscoelasticity (Rkmhv)
                     Use For: Viscoelastic properties
            Friability (Rkmi)
            Hardness (Rkmj)
                Abrasion resistance (Rkmjb)
                Penetration resistance (Rkmjp)
                Puncture resistance (Rkmjs)
                Work hardening (Rkmjw)
            Inertia (Mechanics) (Rkmk)
                Resistance (Mechanics) (Rkmkk)
                     Use For: Damping coefficient; Damping constant; Mechanical resistance
            Plasticity (Rkml)
                 Use For: Plastic properties
                Brittleness (Rkmlb)
                    Embrittlement (Rkmlbe)
                        Acid brittleness (Rkmlbeb)
                    Fracture properties (Rkmlbf)
                         Use For: Fracture strength; Fracture toughness
                Creep properties (Rkmlf)
                Ductility (Rkmlm)
                Elastoplasticity (Rkmlq)
                Rheological properties (Rkmls)
                Slip resistance (Rkmlt)
                Toughness (Rkmlv)
                Viscoplasticity (Rkmly)
                     Use For: Viscoplastic properties
            Resilience (Materials) (Rkmm)
            Shear properties (Rkmn)
            Shock resistance (Rkmo)
            Static stability (Rkmp)
            Stiffness (Rkmq)
                 Use For: Rigidity
                Flexibility (Rkmqf)
            Tensile properties (Rkmr)
            Workability (Rkmu)
            Mechanical properties by mathematical limits or values (Rkmy)
                Atterberg limits (Rkmya)
                     Use For: Consistency limits
                    Liquid limits (Rkmyam)
                    Plastic limit (Rkmyap)
                    Shrinkage limit (Rkmyas)
                Bulk modulus (Rkmyb)
                     Use For: Bulk modulus of elasticity
                Coefficient of friction (Rkmyd)
                     Use For: Friction coefficient; Frictional coefficient
                    Angle of repose (Rkmydc)
                        Angle of rest (Rkmydcc)
                Coefficient of internal friction (Rkmye)
                     Use For: Angle of internal friction
                Compliance constant (Rkmyg)
                     Use For: Elastic constant
                Deformation curve (Rkmyh)
                     Use For: Strain distribution; Stress distribution; Stress strain characteristics; Stress strain curves; Stress strain diagrams; Stress strain relations
                    Yield point (Rkmyhy)
                Design load (Rkmyi)
                    Load factor (Rkmyim)
                         Use For: Load rating
                Elastic limit (Rkmyj)
                Fatigue limit (Rkmyk)
                Hygroscopic coefficient (Rkmyl)
                     Use For: Hygroscopicity
                Influence lines (Rkmyn)
                Mechanical impedance (Rkmyo)
                Modulus of deformation (Rkmyp)
                     Use For: Deformability
                Modulus of elasticity (Rkmyq)
                     Use For: Elasticity modulus
                    Dynamic modulus of elasticity (Rkmyqd)
                         Use For: Dynamic modulus
                Modulus of resilience (Rkmyr)
                Modulus of rupture (Rkmys)
                Plasticity index (Rkmyt)
                Poisson ratio (Rkmyu)
                Shear modulus (Rkmyv)
                     Use For: Dynamic shear modulus
                Stress ratio (Rkmyw)
                Young's modulus (Rkmyx)
                Mechanical properties of pavements expressed numerically (Rkmyy)
                    California bearing ratio (Rkmyyc)
                         Use For: CBR
                    Coefficient of subgrade reaction (Rkmyyf)
                         Use For: Modulus of subgrade reaction
                    Drainage coefficient (Pavements) (Rkmyyj)
                    Layer coefficient (Pavements) (Rkmyym)
                    Structural number (Pavements) (Rkmyys)
                    Traffic equivalence factor (Rkmyyt)
                         Use For: Equivalency factors; Equivalency ratio; Equivalent weight
        Optical properties (Rko)
            Angle of incidence (Rkoa)
            Brightness (Rkob)
            Color (Rkoc)
                 Use For: Colors; Colour
                Blue (Rkocb)
                Green (Rkocg)
                Orange (Rkoco)
                Red (Rkocr)
                White (Rkocw)
                Yellow (Rkocy)
            Contrast (Rkoe)
            Fluorescence (Rkof)
                 Use For: Bloom
            Luminosity factor (Rkok)
            Luminous intensity (Rkom)
                 Related Term (Associative): Photometry (Gmcepp)
                Luminance (Rkomm)
            Opacity (Rkop)
                Optical density (Rkopp)
            Reflectivity (Rkor)
                 Use For: Reflectance (Physics)
                Retroreflectivity (Rkorr)
            Transparence (Rkot)
        Physical properties (Rkp)
             Use For: Physical characteristics
             Related Term (Associative): 
            Density (Rkpd)
                 Related Term (Associative): Compaction (Fcbc)
                Bulk density (Rkpdb)
                Compactibility (Rkpdc)
                     Use For: Compactability
                Dry density (Rkpdd)
                Field density (Rkpdf)
                High density (Rkpdh)
                In place density (Rkpdj)
                Low density (Rkpdk)
                Specific gravity (Rkpds)
                     Use For: Bulk specific gravity; Relative density
                Wet density (Rkpdw)
            Direction of measurement properties (Rkpj)
                Anisotropy (Physics) (Rkpjb)
                     Use For: Aeolotropy
                Isotropy (Rkpjj)
                     Use For: Isotropism
            Microstructure (Rkpk)
            Moisture content (Rkpm)
                 Use For: Water content
                Dryness (Rkpmd)
                Percent saturation (Rkpmp)
                     Use For: Degree of saturation; Saturation
                     Related Term (Associative): 
            Molecular structure (Rkpn)
            Porosity (Rkpp)
            Steady state (Rkps)
            Texture (Rkpt)
                 Use For: Surface properties; Surface texture
                Grain shape (Geology) (Rkpth)
                Grain size (Geology) (Rkptj)
                     Use For: Particle sizes
                Macrotexture (Rkptk)
                Microtexture (Rkptm)
                Pore size distribution (Rkptp)
                Roughness (Rkptr)
                     Use For: Surface roughness; Unevenness
                Shape (Rkpts)
                    Angularity (Rkptsb)
                    Asymmetry (Rkptsd)
                    Thinness (Rkptst)
                Skid resistance (Rkptt)
                Slipperiness (Rkptu)
                Smoothness (Rkptw)
                Void ratios (Rkpty)
            Volume (Rkpv)
                Size (Rkpvs)
                     Use For: Dimensions
                     Related Term (Associative): 
                    Depth (Rkpvsd)
                         Related Term (Associative): 
                    Fineness (Rkpvsf)
                    Height (Rkpvsh)
                    Length (Rkpvsm)
                         Related Term (Associative): ; 
                    Specific surface (Rkpvss)
                    Width (Rkpvsw)
                Thickness (Rkpvt)
            Weight (Rkpw)
                Gross weight (Rkpwg)
                Mass (Rkpwk)
                Molecular weight (Rkpwm)
                Unsprung weight (Rkpwu)
        Physicochemical properties (Rkr)
            Absorptivity (Rkrb)
            Drying rate (Rkrd)
            Gas permeability (Concrete) (Rkre)
            Hydrophobic properties (Rkrh)
                 Related Term (Associative): 
            Permeability (Rkrp)
                 Use For: Conductivity (Geology); Watertightness
            Swelling index (Rkrt)
                 Use For: Moisture density relations
        Thermal properties (Rkt)
             Use For: Thermodynamic properties
            Adiabatic conditions (Rkta)
            Diffusivity (Rktb)
                 Use For: Thermal diffusivity
            Enthalpy (Rkte)
                 Use For: Heat content; Sensible heat; Total heat
                Heat of hydration (Rkteh)
                Heat of solution (Rktes)
            Entropy (Statistical mechanics) (Rktf)
            Freeze thaw durability (Rktg)
            Frost susceptibility (Rkth)
            Specific heat (Rktk)
            Temperature (Rktm)
                 Use For: Temperature effects
                Isotherms (Rktmc)
                High temperature (Rktmh)
                     Related Term (Associative): Hot weather (Jbmwbbh)
                Low temperature (Rktmm)
                     Related Term (Associative): Cold weather (Jbmwbbc)
                Surface temperature (Rktms)
                Temperature points (Rktmt)
                    Freezing point (Rktmtf)
                    Melting point (Rktmtm)
                    Softening point (Rktmts)
                    Transition point (Rktmtt)
                         Use For: Transition temperature
            Thermal conductivity (Rktp)
                 Use For: Conductivity (Heat)
            Thermal resistance (Rktt)
                 Use For: Heat resistance
            Thermal stability (Rktv)
            Transport properties (Physics) (Rktw)
        Properties of fluids (Rkw)
            Dew point (Rkwd)
            Flow fields (Rkwf)
                 Use For: Flow distribution
                Flow visualization (Rkwff)
            Fluidity (Rkwg)
                Low temperature fluidity (Rkwgm)
            Hydraulic properties (Rkwj)
                Hydraulic gradient (Rkwjg)
            Oxygen content (Rkwk)
            Permeability coefficient (Rkwm)
                 Use For: Coefficient of permeability; Hydraulic conductivity
            Pressure resistance (Rkwp)
            Roughness coefficient (Rkwr)
            Turbidity (Rkwt)
            Viscosity (Rkwv)

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