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Aluminum casting. The reaming of pin holes in pistons. These bright cylinders are destined for use in the army's jeeps. They're among the war products of a huge Midwest aluminum foundry. Aluminum Industries Inc., Cincinnati, Ohio. Sourced from the Library of Congress.

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Aluminum casting. The reaming of pin holes in pistons. These bright cylinders are destined for use in the army's jeeps. They're among the war products of a huge Midwest aluminum foundry. Aluminum Industries Inc., Cincinnati, Ohio. Sourced from the Library of Congress.

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