unit head boring machine

例句：

1. 1. This unit head boring machine is very efficient in cutting through concrete.
   这台单元头钻孔机在切割混凝土时非常高效。
2. 2.The engineers used this unit head boring machine to level the foundation of the new building.
   工程师们使用这台单元头钻孔机来平整新建筑的基础。
3. 3.The unit head boring machine was a critical component in the construction of the bridge.
   单元头钻孔机是桥梁建设中的关键部件。