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Natural earth crust materials (Rbe)

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Materials (R)
    Classes of materials (Rb)
        States of matter (Rbb)
        Chemicals (Rbc)
        Water (Rbd)
        Natural earth crust materials (Rbe)
            Deposits (Geology) (Rbeb)
            Weathered earth crust materials (Rbed)
            Parent materials (Rbep)
            Rocks (Rber)
                 Use For: Rock
            Soils (Rbes)
            Petroleum (Rbeu)
                 Related Term (Associative): Petroleum fuels (Rbffp)
        Fuels (Rbf)
        Air (Rbj)
        Building materials (Rbm)
             Use For: Construction materials
             Related Term (Associative): Equipment (Qt)