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Water (Rbd)

Computer viruses ()
Materials (R)
    Classes of materials (Rb)
        States of matter (Rbb)
        Chemicals (Rbc)
        Water (Rbd)
            Water phases (Rbdb)
            Water by salt content (Rbdm)
        Natural earth crust materials (Rbe)
        Fuels (Rbf)
        Air (Rbj)
        Building materials (Rbm)
             Use For: Construction materials
             Related Term (Associative): Equipment (Qt)