KeyWords: Special-Shape Welding Machine , Dual Workplace Side Hook Welding Machine , Single workplace side hook welding machine , Side Hook Automatic Welding Machine , High-Efficiency Double Deck Roll Forming Machine , Electric Rail Roll Forming Machine DIN Rail roll forming machine , Full automatic storage box beam roll forming machine , Automatic size changing storage beam roll forming machine with auto folding and combine system , Automatic stack roof drip edge roll forming machine high speed ,