crankpin bearing lubrication

例句：

1. 1. The engine needs regularcrankpin bearing lubrication tomaintain its efficiency.
   发动机需要定期的曲柄销轴承润滑以保持其效率。
2. 2. Thetechnician inspected the crankpin bearinglubrication system and found no signsof wear.
   技术员检查了曲柄销轴承润滑系统，没有发现磨损的迹象。
3. 3.The workshop had to replace the crankpin bearing lubrication due to contamination from foreign particles.
   车间不得不更换曲柄销轴承润滑，因为外来颗粒污染。