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Coal based materials (Rbmdpf)

Computer viruses ()
Computer security ()
     Use For: Cybersecurity
Materials (R)
    Classes of materials (Rb)
        Building materials (Rbm)
             Use For: Construction materials
             Related Term (Associative): Equipment (Qt)
            Building materials by properties (Rbmd)
                Hydrocarbon based materials (Rbmdp)
                    Asphalt based materials (Rbmdpb)
                    Bituminous materials (Rbmdpc)
                    Coal based materials (Rbmdpf)
                        Coal liquids (Rbmdpfc)
                        Coal tars (Rbmdpff)
                        Coke (Rbmdpfm)
                        Creosote (Rbmdpfp)
                    Maltha based materials (Rbmdpm)
                    Petrochemicals (Rbmdpp)
                         Use For: Petroleum chemicals
                    Hydrocarbon based materials from multiple sources (Rbmdpt)