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By certification 
This machine is used for Submerged-arc welding of wheel rim. (web: www-dot-jinanjili-dot-com, email:jilimachine-at-gmail-dot-com) Submerged-arc welding power can select pneumatic chuck and flux recovery device as option. The feature of pneumatic chuck includes reliable workpiece positioning, big adjustable scope of chuck jaw, simultaneous positioning and clamping for many wheels.
