the weathering coal的用法和樣例：
例句
- This article presents the production of the foliage fertilizers of humic acid from weathered coals and its application.
介紹以貴州風(fēng)化煤為原料，生產(chǎn)腐植酸多元復合肥的生產(chǎn)方法及應用前景。 - Thebinder of humic acid sodium obtained from wethering coal is used for briquetting fine coke producing on the vertical oven.
本文介紹了從風(fēng)化煤中提取腐植酸鈉作粘結劑用于直立爐粉焦成型制氣。
