gas-expansion hole

例句：

1. 1. The engineer found a gas-expansion hole in the engine.
   工程师在发动机里发现了一个气体膨胀孔。
2. 2.The gasket was worn out and needed to be replaced.
   垫圈磨损了，需要更换。
3. 3.Gasket holes are important for preventing leaks in the engine.
   垫圈孔对于防止发动机泄漏非常重要。