The precision spot welding machine is suitable for welding sensors, LED and their leads, copper foil and enameled wire, relays, electronic sockets, and welding of tungsten-molybdenum materials for electric light. So what is the difference between precision spot welding machine and seam welding machine? The difference is that the electrodes of precision spot welding machine are two cylindrical ones, which are suitable for welding overlapped plates; while the electrodes of seam welding machine are two wheels, which are suitable for manufacturing sealing enclosures. Seam welding machine refers to the welding assembly of lap joint or butt joint and placing it between two rolling electrodes.