lubricant plug

例句：

1. 1. The oil plug in the engine needs to be replaced regularly.
   发动机里的油塞需要定期更换。
2. 2.The grease plug is a small device that keeps the oil from leaking out of the engine.
   这个小装置是用来防止机油从引擎中泄漏的。
3. 3. The mechanic used an oil plug to remove the old engine part.
   这位机械师用一个油塞来移除旧的引擎部件。