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Coal tars (Rbmdpff)

Computer viruses ()
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)
                    Coal based materials (Rbmdpf)
                        Coal liquids (Rbmdpfc)
                        Coal tars (Rbmdpff)
                        Coke (Rbmdpfm)
                        Creosote (Rbmdpfp)