PVC Window and Door Welding Machine 1.Two Heads 2.Welding head can be used individually,jointly 3.PC control 4 ... (Plastic) Window and Door Machinery Two Heads(Two Points)Welding Machine or WeldersFeatures:This machine is made up of two heads, frame, electric ... location structure, pressing structure, heating structure and head box. This machine is one of the necessary equipment for processing PVC Window ...