This welding machine is one of the necessary equipment for processing PVC Window and Door. It can complete the whole welding alone. It features advanced technique, pneumatic drive, PC control, stable capability and simple operation. The CM non-oil lubricating bearing and liner moving bearing make high precision and convenient maintaining. The machine has one head that can weld various angles. The two heads can work individually and jointly. It enables welding for such shapes as ┗ ┣ ┳ ┏┓ ┳╋ ╋ etc.