IGBT SOFT SWITCH AC/DC TIG WELDING MACHINE 1.Strong welding 2.HF Arc-starting ,High welding quality 3 CE and ISO9001 IGBT SOFT SWITCH INVERTER AC/DC SQUARE WAVE TIG WELDING MACHINE WSME 315 FUNCTION AND FEATURE(1)HF Arc-starting, impulse control and strong welding permeability.(2)Be satisfied requirements of welding technological.(3)Be able to weld mild steel, stainless steel,copper and titanor ...