pusher-feed rock drill

例句：

1. 1.The rock drill is designed to quickly break through the hard rock.
   这种钻机设计用来快速穿透坚硬的岩石。
2. 2.The pusher feed system ensures that the drill bit remains in place during the entire operation.
   推进器供料系统确保钻头在整个操作过程中保持就位。
3. 3. The rock drill was used to extract valuable minerals from deep within the earth's crust.
   用这种钻机从地球地壳深处提取有价值的矿物。