Stainless steel straight seam welding machine 1,Easy install 2,Easy operation 3,Small size Straight seam welding machine is a kind ... solar water heater tube straight seam welding, production line is connected with the straight seam welded steel, H steel welding and so ... size, material of the electric heating kettle’s different weldingrequirements, LiHua’s machine will meet customer demand for different ...