butt mill

例句：

1. 1. The butt mill was used to drive the heavy equipment.
   打桩机用来驱动重型设备。
2. 2. The butt mill was essential for the construction of the new bridge.
   打桩机对于建造新桥是至关重要的。
3. 3. The butt mill was used to level the ground before the construction began.
   打桩机在施工开始前被用来平整地面。