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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)