Coal mining working face

• 采煤工作面

Coal mining working face的用法和样例：

例句

1. Prewetting of coal seams by water infusion is an essential measure for dust control at working faces.
   煤层注水预湿是采煤工作面防尘的治本措施，添加湿润剂是改善煤层注水效果的重要途径。