... voltage controlled Zhengzhou Gou's New Quenching machine tool For Valve, Cylinder Main configuration:1, CNC system control;2, Stepper ... motor drive;3, Ball screw drive;4, Cylinder linear guide rail, ball slider sliding;5, AC variable speed motor ... preheating. 8) can be manually operated, but also semi-automatic and fully automatic operation; you can even continue working long hours can ...