... maintainance cost 5,save 30% energy IGBT technology induction metal processing equipmentInduction Equipment Features:1, a unique cooling circulation ... , straight shank twist drill of hot forging, hot rolling, metal annealing. Such as: tensile steel; wire, nail wire heating ... pliers and all kinds of shafts, cams, sprockets, gears, valves, ball stud, a large machine tool guide, ductile iron quenching ...