... PVC window 3.best service pvc plastic window welding machineMain Features1.Used for welding PVC door-window2.PLC control, pneumatic drive ... , simple operation, stable capability.3.Welding three-point, two-point, single point, transom, cross - ... pass make-up and melt spacing, 7.high-precision welding Technical Parameters Main motor power 3.5KW Working voltage380V ...