短语词组短语rotor r starter 转子起动器rotor resistance starter 转子电阻起动器;转子电阻启动器stator -rotor starter 定子转子起动器rheostatic rotor starter 转子变阻起动器rotor -resistance starter 转子串电阻起动器rotor r resistance starter 转子电阻起动器 返回 rotor starter