在使用扬程范围内使用，保证电机无过载。
In the context of the use of lift to use, to ensure Motor overload.
增益控制可以增大接收机的动态范围，防止强信号引起过载。
Gain control can increase the dynamic range of the receiver, and to prevent strong signals cause overload.
具有全扬程泵的特点，能够在全扬程范围内工作而保证电机不会过载。
It has full head feature. It can operate within the full head scope with assurance that the motor will not be overload.
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