... fields of furniture, vehicle, electric power, construction, conduit.... WS series IGBT invert DC TIG welderItem\ModelWS-315WS-400WS-500WS-630DC Pulse ... functions of SMAW, DC TIG, and etc., suitable to weld on carbon steel & SS and others metal.b). Pre-set welding ... , gas pre-flow, gas post-flow function.e). Advanced IGBT-20KHzTM dual inverter technology and digital controllable, and its intelligent ...