coal waste rock

• 煤矸石

coal waste rock的用法和样例：

例句

1. 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。
2. 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。