underground working

• 地下开采

underground working的用法和样例：

例句

1. At last, the paper introduces the application method of wetting agents to suppress dust in underground mines.
   最后介绍了湿润剂在地下开采矿山中的具体应用方法。
2. The strata movement and the ground surface subsidence caused by underground mining are serious underground engineering problems.
   地下开采引起的岩层移动和地表沉陷是一个非常严重的地下工程问题。