When the frequency changer has malfunction, power frequency is adopted, and the motor speed is nonadjustable.
万一变频器出现故障时，
工频驱动，转速
。
整的,需整的When the frequency changer has malfunction, power frequency is adopted, and the motor speed is nonadjustable.
万一变频器出现故障时，工频驱动，转速。
：
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