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Production. Pratt and Whitney airplane engines. A gear for a Pratt and Whitney engine is tested for hardness on a Rockwell…
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Production. Pratt and Whitney airplane engines. A gear for a Pratt and Whitney engine is tested for hardness on a Rockwell machine in a large Eastern plant now producing a steady flow of airplane motors for the planes that will help us bring victory. Pratt and Whitney Aircraft. Sourced from the Library of Congress.

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Production. Pratt and Whitney airplane engines. A gear for a Pratt and Whitney engine is tested for hardness on a Rockwell machine in a large Eastern plant now producing a steady flow of airplane motors for the planes that will help us bring victory. Pratt and Whitney Aircraft. Sourced from the Library of Congress.

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