在低于额定负载时，电机的运行效率较低；
The efficiency is quite low when the motor is running under the rated load.
充电快：比常规电机工作更早，工作时间更长，效率更高。
Charge fast: it can run far long time and more efficiency than the normal one.
采用步进电机控制，贴标精确，误差小，效率高。
It is characterized by accurate label, less error, high efficiency and step electric control.
水电站机组流量测量技术是原型水轮发电机组效率试验的关键技术。
The flow measuring technology of hydropower equipment is the key skill in prototype efficiency test.
水电站机组流量测量技术是原型水轮发电机组效率试验的关键技术。
The flow measuring technology of hydropower equipment is the key skill in prototype efficiency test.
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