rock drill on airfeed leg

例句：

1. 1.The engineer used a rock drill to bore a hole in the rock.
   工程师使用岩心钻探器在岩石中钻孔。
2. 2.The geologist used a rock drill to extract samples from the rock.
   地质学家使用岩心钻探器从岩石中提取样本。
3. 3. The rock drill was essential for the construction of the new road.
   岩心钻探器对于新道路的建设至关重要。