... 5:safety voltage controlled Zhengzhou Gou's New Quenching machine tool For Valve, Cylinder Main configuration:1, CNC system control;2, Stepper ... screw, screw the top down;7, Solenoid valve control water;8, With a heating device control plug.Gou's New Quenching ... , simple, open or stopped at any time. And without preheating. 8) can be manually operated, but also semi-automatic and fully ...