... voltage controlled Zhengzhou Gou's New Quenching machine tool For Valve, Cylinder Main configuration:1, CNC system control;2, Stepper motor ... gear motor drive screw, screw the top down;7, Solenoid valve control water;8, With a heating device control plug.Gou ... second. So that the workpiece surface oxidation and decarbonization are lighter, most of the artifacts are not gas. 3) the equipment ...