... Inverter DC arc welding machine. 3.Deliver time 15-30 days. Inverter Plasma Cutter Machine (Cut-40) Detailed Product Description 1. DC Inverter ... in steel, aluminum, stainless steel, copper sheet cutting. Inverter frequency up to 100kHz, the conversion efficiency of 80%, ... ; 70 or more non-contact with the arc method, instantaneous arc superior performance, can facilitate untreated with rust ...