... 1. 2. WD-KD3: digital circuits, pull codes regulating, three periods discharge, to special materials can do preheat, melting, regulate ... on.The specification of the pneumatic ac pulse spot welding machine:Model InputPowerOutput currentPressure pressRangeClosed sizeDistance of plateDistance ot lectrodeCool ... -5408WL-SP-200K380/1200500001500100130-230260490-5408 AC multi-head spot welding machine