 1 SEMI AUTOMATIC SUBMERGED ARC WELDER - TANK ROUND SEAM WELDER |
 2 SEMI AUTOMATIC SUBMERGED ARC WELDER - TANK ROUND SEAM WELDER |
 3 SUBMERGED ARC WELDING PROCESS ON FLAT LAP WELDED PLATE |
 4 SHILEDED METAL ARC WELDING PROCESS - 100% PENETRATION PIPE WELDING |