... integrated control 3 water-cooled hi Pneumatic Spot Projection Welding Machine Features:1, with spot welding, projection welding, Pai welding function;2, pressure transmission ... steel, coated steel, non-ferrous metal wire, sheet, pipe. Pneumatic Spot Projection Welding Machine ProjectTypeRated capacitythe primary voltagemaximum electrode pressureelectrode travelwelding capabilityDN ...