power-auger boring

例句：

1. 1. The power-auger boringwas used to remove the old concreteslab.
   使用动力钻机来移除旧的混凝土板。
2. 2. The boring machine isessential for drilling holes in hard materials.
   钻孔机对于在硬质材料中钻孔至关重要。
3. 3. The engineers were busy installing thepower-auger boring at the constructionsite.
   工程师们忙于在施工现场安装动力钻机。