Tri-phase AC induction motor is used as the driving power for roller system.PWM variable frequence speed regulation is applied for motor speed control.是什么意思_Tri-phase AC induction motor is used as the driving power for roller system.PWM variable frequence speed regulation is applied for motor speed control.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句