cap of maintenance

例句：

1. 1. The engineer carefully removedthe cap of maintenance from the machine toinspect it.
   工程师小心地从机器上取下维护帽进行检查。
2. 2. The technician replaced the capof maintenance on the car's enginecompartment.
   技师在汽车引擎舱更换了维护帽。
3. 3. The maintenance team had just finished cleaningthe cap of the building's HVACsystem.
   维护团队刚刚完成了对建筑空调系统的清洁工作。