... Adopt international standard digital control IGBT inverter technology, use microprocessor to control accurately, easily to use, high efficiency, software can be upgraded ... parameter can be loaded easily.4. Satisfied AC/DC TIG welding, mix AC/DC TIG welding, MMA welding, and so on.5. ... steel, carbon steel, copper, aluminums and titanium. Digital IGBT Inverter AC/DC Pulse TIG WSE-315D welding machines