operation and maintenance phase

基本解释

And the utility model can avoid detaching the drum when exchanges phase dam, with compact structure, stable operation, easy application and maintenance, for producing large device.
更换相堰时不用拆卸转鼓，结构紧凑，运行稳定，在使用、维修等方面更加合理，更适用于制造大型设备。
ip.com
The solution on clock synchronization composes with GPS, operation maintenance, software locking phase control. And the last one is researched specially, and some test data are given.
本时钟同步管理方案由GPS通信模块、操作维护、软件控制管理三部分组成，重点研究了软件锁相控制算法，并给出了测试数据。