双速电钻electric two-speed drill【机】
双速的two-speed
双速离合器two-speed clutch
双速交流电力拖动two-speed AC electric drive【机】
磁放大器双速伺服系统magnetic amplifier two-speed servosystem【自】
双速齿轮two-speed gear
双速辊筒运输机two-speed driving side roller conveyor【机】
双速电动葫芦two-speed electric block