• In this paper the effect of ti, fe, Cu, Niand Zn compounds on the photodegradation of polyolefins was sum...

    本文主要综述、铜、等金属化合物聚烯烃降解影响

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  • There exist large Au, Cu, Pb-Zn, Ni, rare metals, rare earth, Sn, Mo, V, Ti, W and some other types of ore deposits.

    具有大型、 超大型规模矿产为、铜、铅锌稀有金属稀土金属、以及

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  • The contents of ti in magnetite and s in ore are low, with a very small amount of Pb-Zn sulfide minerals.

    磁铁矿含量矿石中硫含量低,罕见铅锌硫化物矿物

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  • The contents of ti in magnetite and s in ore are low, with a very small amount of Pb-Zn sulfide minerals.

    磁铁矿含量矿石中硫含量低,罕见铅锌硫化物矿物

    youdao

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