dry washing of coal

例句：

1. 1.The dry washing of coal is an important process in the coal industry.
   煤炭的干燥洗选是煤炭工业中的一个重要过程。
2. 2. The company uses advanced technology to dry wash coal, reducing environmental pollution.
   该公司采用先进技术进行煤炭干燥洗选，减少环境污染。
3. 3. The dry washing of coal has become a hot topic in recent years due to its environmental benefits.
   由于其环保效益，近年来煤炭干燥洗选已成为热门话题。