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Compared with the lever pedal spot welder, the pneumatic stainless steel spot welder has a much more complicated process. It is also the largest-selling model among resistance welders. It can not only weld stainless steel, galvanized plate, mild steel, round wire, filter screen, low alloy, but also can weld copper, aluminum and other materials by replacing the electrode head. Spot welders are calledMultifunctional spot welding machineThat’s right.