flat twist drill

例句：

1. 1. The engineer used a flattwist drill to make the holes in thewood.
   工程师使用平钻在木头上打孔。
2. 2. The flat twist drill was used todrill through the concrete wall.
   平钻被用来钻透混凝土墙。
3. 3. The flattwist drill is a versatiletool that can be used forvarious tasks.
   平钻是一种多功能工具，可以用于各种任务。