... dc power 3.LCD Touch Screen,Aeronautical material 4.Automatic tracking the arc length 5.ISO9001,CQC ARC WELDING MACHINE WITH MOSFET ... of pipe-pipe joint way, and various groove form3. Wire unit according to working environment different, can use built-in ... can work long hours6. Driving and wire adopts stepping motor, the nose reliable7. Nose equipped with balancer, operation convenience, the reduction ...