贵金属矿砂及其精矿。
冶金是物理、化学、工程有关，金属矿砂开采，最后的产品。
Metallurgy is the physics, chemistry, and engineering related to metals from ore extraction to the final product.
各种天然砂，不论是否着色，但第二十六章的含金属矿砂除外。
Natural sands of all kinds, whether or not coloured, other than metal-bearing sands of Chapter 26.
它广泛用于单独的黑色，有色金属，非金属和稀有金属矿物。如金矿，铜矿，铅，锌矿砂，锡矿山等。
It is widely used to separate ferrous, nonferrous, nonmetal and rare metal minerals. such as gold mine, copper mine, lead-zinc ore, tin mine and so on.
它广泛用于单独的黑色，有色金属，非金属和稀有金属矿物。如金矿，铜矿，铅，锌矿砂，锡矿山等。
It is widely used to separate ferrous, nonferrous, nonmetal and rare metal minerals. such as gold mine, copper mine, lead-zinc ore, tin mine and so on.
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