connecting rod upper bearing shell

例句：

1. 1.The connecting rod is the part of the piston that connects to the crankshaft.
   连杆是活塞与曲轴连接的部分。
2. 2. The upper bearing shell protects the piston from overheating.
   上轴承壳保护活塞免受过热。
3. 3.The engineer inspected the connecting rod and upper bearing shell for any signs of wear or damage.
   工程师检查了连杆和上轴承壳，以查看任何磨损或损坏的迹象。