当水开关关闭时变量泵不供油，电流下降使电机处在空载待机状态，这样就有效达到节能。
When the switch is closed, the variable pump has no oil supply, the current decline will keep the motor in empty waiting state, thus effectively save energy.
当水开关关闭时变量泵不供油，电流下降使电机处在空载待机状态，这样就有效达到节能。
When the switch is closed, the variable pump has no oil supply, the current decline will keep the motor in empty waiting state, thus effectively save energy.
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