... welding PVC door-window. 2.window machine 3.CE Two-head PVC Welding Machine for plastic window HJ02-3500.2 ... control, pneumatic drive, simple operation, stable capability. Weld thre e-point, two point, single point, transom, cross -transom and special angle. Four heads can ... heads, frame, electric controller box, profile-holding frame, etc.Two-head PVC Welding Machine for plastic window HJ02-3500.2 ...