... duty cycle 3.stable performance High speed DC inverter plasma cutting machine ◊welding style:to cut with ordinary compressed air ◊ ... , pipes, vehicles, aerospace and other manufacturing; ◊cutting materials: mainly used for carbon steel,alloy steel,stainless steel,cast iron, aluminum ... metal with a rust and paint to be cut; 3.do not pollute the environment, more economical than flame cutting machine, ...