elevator door短语⁶⁹¹¹⁴ 基本例句 电梯门 Our company has developed PMSM, the new controller of three-phase asynchronous frequency conversion motor, PMSM matching with the new controller and small elevator door operator without encoder. 公司已研发出能控制永磁同步电机；三相异步变频电机最新型的控制器，与此相匹配的门机永磁同步电机及无需编码器的小型化门机。 iciba