... 5:safety voltage controlled Zhengzhou Gou's New Quenching machine tool For Valve, Cylinder Main configuration:1, ... multi-usage. Complete quenching, annealing, tempering, normalizing, quenching and other heat treatment process, but also complete welding, melting ... protection and energy saving, safe, reliable, good working conditions for workers. Zhengzhou Gou's New Quenching machine tool For Valve, ...