... 3.Mosfet technology 4.ISO 9001:2000 5.Environment-friendly Small size solid high-frequency heating power (super audio power)Use IGBT ... heat; Rolling straight handle manual twist drill, pliers, wrench, screw and other kinds of tools heat treatment; Gear, wheel machine ... bar stock hot forging, bolts and nuts; temperature pier Valve, screw end, gear, auto parts machine, bed guide quenching; Metal thin ...