piston pin bushing

例句：

1. 1. The engine needs to be replaced with a new piston pin bushing.
   发动机需要用新的活塞销衬套来更换。
2. 2.The technician carefully removed the old piston pin bushing and installed the new one.
   技师小心翼翼地拆下了旧的活塞销衬套，并安装了新的。
3. 3.The piston pin bushing is crucial for ensuring smooth operation of the engine.
   活塞销衬套对于确保发动机平稳运行至关重要。