rock drilling machine

• 钻岩机,凿岩机

rock drilling machine的用法和样例：

例句

1. The rock drill is indispensable for digging coal mines.
   凿岩机是煤炭采掘不可缺少的工具。
2. Often, water is pumped into specially drilled wells to dissolve the rock -salt deposits.
   水经常抽入特别地凿岩机溶解沉积的岩盐。