counterbore cutter

例句：

1. 1. The engineer used a counterbore cutter to bore holes in the rock.
   工程师使用反冲钻头在岩石中钻孔。
2. 2. The counterbore cutter was essential for removing the old concrete before installing the new one.
   反冲钻头对于在安装新混凝土之前移除旧混凝土至关重要。
3. 3. The counterbore cutter was used to create a smooth surface for the new floor.
   反冲钻头被用来为新的地板创造一个光滑的表面。