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Production. Pratt and Whitney airplane engines. Installing rings on pistons for Pratt and Whitney airplane engines in a…
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Production. Pratt and Whitney airplane engines. Installing rings on pistons for Pratt and Whitney airplane engines in a large Eastern plant. The pistons, the rings, and the cylinders in which they will be fitted, are built to the finest American standards. Pratt and Whitney Aircraft. Sourced from the Library of Congress.

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Production. Pratt and Whitney airplane engines. Installing rings on pistons for Pratt and Whitney airplane engines in a large Eastern plant. The pistons, the rings, and the cylinders in which they will be fitted, are built to the finest American standards. Pratt and Whitney Aircraft. Sourced from the Library of Congress.

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