DC PULSE TIG WELDING MACHINE 1.IGBT high frequency soft switch transforms, high efficiency , small volume, light weight DC PULSE TIG WELDING MACHINEMODELITEMWSM-200WSM-315WSM-400rated ... stable, the welding quality is high;5. Pulse current, the pulse frequency, the pulse width may adjust willfully in the wide range ... is stable, the reliability is high, the welded joint forms PULSE TIG WELDING MACHINE