... -200KR, NB-350KR, NB-500KR NB Thyristor Controller CO2/MAG Automatic Welder adopts integrate circuit, technology of power mould high capacity ... with other kinds of air automatic welding machine.It is suit for welding many kinds of metal, such as low carbon steel ... , stainless steel and aluminum.It is suit for car building, metal structure, chemical machinery, boiler pressure vessel, pipe and so on ...