We provide advanced equipment for the production of fin walls for distribution transformer tanks by using the production lines of the superconducting feed tank. The seam welding unit with cmt cold metal transfer technology boils the front seams of the fins. Optional units: quick tool change systems • semi-automatic leveling and insertion system for reinforcing bars • prominent spot welding machine • point bar welding machines • curved edge units • retaining clamps for assembling and welding fin walls.