coal waste rock的用法和樣例：
例句
- Supply wide range of high quality anthracite, the quality anthracite, coal gangue.
供應各種優(yōu)質(zhì)無(wú)煙煤，次質(zhì)無(wú)煙煤，煤矸石。 - Using coal gangue as raw material, we made a kind of new type polymer reinforcing filler for rubber by ultr.
本論文用煤矸石作原料，通過(guò)超細粉碎，表面改性制成了一種高分子聚合物的補強填充劑。
