... upgraded and cooperated with automatic welding machinery.2. Adopt soft contact functional key-press in the panel, single knob adjust stepless ... technological parameter can be loaded easily.4. Satisfied AC/DC TIG welding, mix AC/DC TIG welding, MMA welding, and so on ... steel, carbon steel, copper, aluminums and titanium. Digital IGBT Inverter AC/DC Pulse TIG WSE-315D welding machines