Detailed Product Description Spot Welding Machine/Welder/High Frequency Welding Machine 1. The advantage of this machine is high precision of welding spot and stable pressure. 2. There is fews of black welding spot when welding stainless steel, and the welding mark is unconspicuous. 3. Meanwhile, as it adopts contactless controll circuit, there are no electric relay, contactor and other electric ...