1 Air pasma welding 2 Inverter techonology plasma welding 3 Portable design plasma welding 4 PWM technic plasma welding plasma welding Function and FeaturesHigh ... technology for CUT30/40.Suitable for many kinds of metal welding, such as stainless steel, titanium, iron, and ... aluminum etc.kinds of metal welding, such as stainless steel, titanium, iron, and aluminum etc ...