Hwashi WL-AT-PM1200 Automatic Sink Rolling Wheel Grinding Machine,Water tank Welding Production Line CNC 3 Axis Control Stainless Steel Kitchen Sink Seam Welding Machine is a method that uses a pair of roller electrodes instead of the cylindrical electrodes of spot welding, and the welded workpiece moves between the rollers to produce a sealed weld with a molten core overlapping each other to weld the workpiece together. Adopt medium frequency inverter power source of welding