Pneumatic spot welding machine (sa-600) Features: 1.New stroke variable pneumatic cylinder. Built-in lubrication-free bearing suits high speed & long operation period. Lower air consumption, faster welding reaction. 2.Precision digital ic control circuit no connection joints, simplified programming operations with better welding results. 3.With our own welding control, it is easy to assemble with automatic welding lines from capability of applying multiple welding units (15 units max) according to different requirements. 4.Toughest machine body with water circulation cooling system for high speed continual operation. 5.Scr circuit switch with current charge controller, perform best durability, reliability & welding quality. Please visit our web site at www(dot)goldspot(dot)com(dot)tw for more details. Price, moq, deliver time are negotiable, please contact us for correct quotation and product details.