double closed-loop speed control system 双环调速系统
closed-loop variable speed control 闭环调速系统
speed closed-loop control 速度闭环控制
rotation speed closed-loop control 转速闭环控制
closed-loop control of rotation speed 转速闭环控制
electrohydraulic speed closed-loop control system 电液闭环速度控制系统
electrohydraulic proportional speed closed-loop control 电液比例闭环速度控制
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