Including coal, iron, nonferrous metals, non-metallic and other minerals have done a lot of work.

包括煤、铁、有色金属、非金属等多种矿产方面做了大量的工作。

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Direct reduction is an iron smelting process for producing metallic iron using gas, liquid fuels and non-coke coal as energy to reduce pellets, lump ore and fine ore under solid state.

直接还原是一种以气体、液体燃料或非焦煤为能源，使用球团矿、块矿、粉矿在固态下进行还原生产金属铁的炼铁工艺技术。

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It's suited for polishing the metal surface, mainly Aims at metallic and non metallic, such as stainless steel, stainless iron, bronze, golden, silver, zinc, aluminum for sanding to fine polishing.

主要针对不锈钢，不锈铁，铜，金，银，锌，铝合金等金属、非金属中磨至精细抛光。

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