The block panel production line is the most important production line for the manufacture of block panel of ship，which is composed of the following workstations：
1. Plate positioning and tack welding
2. Butt welding station
3. Stiffener fitting station and tack welding
4. Stiffener welding station
5. Stringer & sprag mounting and tack welding station
6. Stringer and sprag welding station
7. Quality control, lifting and out moving station
