double pitch auger

例句：

1. 1. The engineer used a double pitch auger to dig the foundation for the new building.
   工程师使用双管钻探机为新建筑挖掘地基。
2. 2.The double pitch auger was an essential tool in the construction of the tunnel.
   双管钻探机是隧道建设中不可或缺的工具。
3. 3.The double pitch auger helped the workers to excavate the area quickly and efficiently.
   双管钻探机帮助工人快速而有效地挖掘区域。