... .primary voltage:3 phase380V 3.steel and alloy welding KH-500 Sillicon Controlled Gas Shielded Welder:Product description:1 Small splashing ... crater.6 Automatically cut off the main loop power, protective air supply when stop welding, which is energy-saving.7 Still ... After pickling, Parkerizing, powder coat, paint coating the case of machine, which provides the case firm, anticorrosion and no shed.9 ...