... .Automatic tracking the arc length 5.ISO9001,CQC DC Inverter Heavy Duty Arc Welding Machine (MMA400 ) About us: We are ... 19 years, manufacturing according to the ISO9001:2008, ISO9950 quality control system guidelines, CQC. We help our customer develop ... are used aviation materials, light weight, size stability, and high temperature deformationWelding torch using forced circulation water cooling, can ...