connecting rod lower bearing shell

例句：

1. 1.The engineers carefully assembled the connecting rod lower bearing shell.
   工程师们仔细组装了连杆下轴承壳。
2. 2. The maintenance technician replaced the connecting rod lower bearing shell with a new one.
   维修技术人员用一个新的连杆下轴承壳替换了旧的。
3. 3.During the assembly process, the engineers had to pay close attention to the connecting rod lower bearing shell to ensure it was properly positioned.
   在装配过程中，工程师们必须密切关注连杆下轴承壳，以确保它正确放置。