coal mine spoil是什么意思 coal mine spoil怎么读
coal mine spoil的用法和样例
- Supply wide range of high quality anthracite, the quality anthracite, coal gangue.
供应各种优质无烟煤，次质无烟煤，煤矸石。 - Using coal gangue as raw material, we made a kind of new type polymer reinforcing filler for rubber by ultr.
本论文用煤矸石作原料，通过超细粉碎，表面改性制成了一种高分子聚合物的补强填充剂。
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