短语词组短語rotor field winding resistance 轉子磁場繞組電阻rotor field winding test 轉子磁場繞組試騐rotor field winding continuity test 轉子磁場繞組連續性試騐rotor field winding ground test 轉子磁場繞組接地試騐 返回 rotor field winding