相反，对风力发电机的维护只能在晴好天气下进行。
应急发电机不仅性能可靠而且操作与维护也很方便。
The emergency generator is not only reliable but also easy to operate and maintain.
维护，修理，测试和安装电动机，发电机，交流发电机，工业蓄电池和液压和气动电气控制系统。
Maintain, repair, test and install electrical motors, generators, alternators, industrial storage batteries and hydraulic and pneumatic electrical control systems.
应用推荐