Two kind welding process：
1. ultrasonic lap seam welding,co-extrusion forming.
2. butt-joint argon-arc welding,welding seam
close-gained and smooth.
Controlling center adopting computer control system of Austria B&R company programmable computer.
Long-distance closed loop control automatically the process of the speed of extruding and hauling,temperature and product diameter.

The main technique parameter