washery coal

例句：

1. 1. The washery coal mine is located in the northwest of the city.
   这个煤矿位于城市的西北部。
2. 2. The coal industry plays a crucial role in the country's economy.
   煤炭工业在国家经济中扮演着至关重要的角色。
3. 3. The coal mining company has been facing challenges due to environmental regulations.
   这家煤矿公司因环境法规而面临挑战。