... Welder,Type: NB-200KR, NB-350KR, NB-500KR NB Thyristor Controller CO2/MAG Automatic Welder adopts integrate circuit, technology of power ... . Changed one knob that can welder to choose CO2/MAG, and cooperate with other kinds of air automatic welding machine.It ... carbon steel, low alloy steel, high strength steel, stainless steel and aluminum.It is suit for car building, metal structure, chemical ...