短語(yǔ)詞組短語(yǔ)back -EMF integration 反電勢(shì)積分Direct Back -EMF 直接反電勢(shì)法motor back -EMF 電機(jī)反電勢(shì)Back -EMF coefficient 反電勢(shì)系數(shù)current back -emf 反電勢(shì)電流 返回 back emf