Pneumatic Spot Welding Machine 1 spot welding, row welding 2 microcontroller integrated ... strong, stable and reliable;4, specific current slowly climbed up the system, no sparks flying, can be welded low- ... coated steel, non-ferrous metal wire, sheet, pipe. Pneumatic Spot Welding Machine Project TypeRated capacitythe primary voltagemaximum electrode pressureelectrode travelwelding capabilityDN ...