... ,Type: NB-200KR, NB-350KR, NB-500KR NB Thyristor Controller CO2/MAG Automatic Welder adopts integrate circuit, technology of power mould ... voltage separately. Changed one knob that can welder to choose CO2/MAG, and cooperate with other kinds of air automatic welding ... is suit for car building, metal structure, chemical machinery, boiler pressure vessel, pipe and so on fields.