... 4).Excellent welding performance, similar to Hitachi IGBT Inverter AC/DC Pulse Tig Welder 315A, 400A, 500A DIGITAL OPERATION PANEL ... HIGHLIGHT1. AC/DC TIG welding is mixed function, excellent weld, deep penetration ... chip microcomputer control function, preset various welding parameters.3. AC/DC pulse function, realizing both-side molding under single-side ...