tangential hole

例句：

1. 1. The engineer designed a tangential hole in the wall to improve air circulation.
   工程师在墙上设计了一个切线孔来改善空气流通。
2. 2. The machine has a tangential hole that allows it to rotate freely.
   这台机器有一个切线孔，允许它自由旋转。
3. 3.The construction crew carefully drilled a tangential hole into the concrete floor.
   建筑工人小心地在混凝土地板上钻了一个切线孔。