piston pin bearing

例句：

1. 1.The engine's piston pin bearing was worn out, causing the engine to overheat.
   发动机的活塞销轴承磨损了，导致发动机过热。
2. 2. The technician replaced the worn piston pin bearing with a new one.
   技师用一个新的轴承替换了磨损的活塞销。
3. 3.The piston pin bearing is essential for maintaining the smooth operation of the engine.
   活塞销轴承对于保持发动机平稳运行至关重要。