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Bofors forty-millimeter mounts. The final operation in the manufacture of gun carriages for the Bofors forty-millimeter anti-aircraft guns is taking place on this horizontal milling machine. A workman of a large Midwest rubber company converted to war production is milling the top bearing trunion pads or supports. When this operation is complete, the carriage will be ready for attachment to the chassis which supports the gun and barrel

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