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Conversion. Automobiles to 40 mm. anti-aircraft guns. Applying automobile production methods to machining of 40 mm. anti…
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Conversion. Automobiles to 40 mm. anti-aircraft guns. Applying automobile production methods to machining of 40 mm. anti-aircraft gun barrels in a former automobile plant. Five cutting instruments work at the same time. Under the old single-operation methods of gun making, only one of these could work at one time. Automobile workers are proud of the improvement. Chrysler Corporation, Highland Park, Detroit. Sourced from the Library of Congress.

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Conversion. Automobiles to 40 mm. anti-aircraft guns. Applying automobile production methods to machining of 40 mm. anti-aircraft gun barrels in a former automobile plant. Five cutting instruments work at the same time. Under the old single-operation methods of gun making, only one of these could work at one time. Automobile workers are proud of the improvement. Chrysler Corporation, Highland Park, Detroit. Sourced from the Library of Congress.

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