... :safety voltage controlled Zhengzhou Gou's New Quenching machine tool For Valve, Cylinder Main configuration:1, CNC system control;2, Stepper ... motor drive screw, screw the top down;7, Solenoid valve control water;8, With a heating device control plug.Gou ... protection and energy saving, safe, reliable, good working conditions for workers. Zhengzhou Gou's New Quenching machine tool For Valve, Cylinder