... shell welder High-frequency packing machine 1.Use : for packing a variety of fine stationery, toys, large files, single-sided blister ... packaging, upper embossed large area soft and other welding. 2, Principles :,3 ... 380V / 3interval of upper and lower panels250mm250mm250mm250mmStroke (mm)150150150150Lower Plate size (mm)400 * 600mm400 * 500mm500 * 700mm500 * ...