lube fitting

例句：

1. 1. The engineers were carefully installing the lube fittings for the new machine.
   工程师们正在仔细安装新机器的润滑配件。
2. 2. The technician had to lube the gears before they could be used again.
   技术人员在再次使用之前必须给齿轮加润滑油。
3. 3. The car's engine was so loud that it was hard to hear each other over the lube fittings.
   汽车发动机的声音太大，以至于很难通过润滑配件听到彼此的声音。