二级保养
- 网络second level service; second echelon maintenance
二级保养二级保养
second level service
... ·保养计划完成率 fulfilment ratio of servi ·二级保养 second level service ·设备日常保养完成率 plant daily service f ...
second echelon maintenance
... 二级保养 second echelon maintenance 指挥(权责)二级单位 second echelon of command ...