... and annealing medium frequency induction heat treating machine of big shaftZhengzhou Gao electromagnetic induction heating equipment ... annealed stainless steel products, up type.2, heat treating all kinds of hardware tools, electrical, hydraulic, ... of shafts, cams, sprockets, gears, valves, ball stud, large-scale machine tool guide, ductile iron hardened.3, various brazing carbide blades, turning ...