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Boeing aircraft plant, Seattle, Washington. Production of B-17F (Flying Fortress) bombing planes. Machine screws to be used in building a B-17F (Flying Fortress) are attached to hangers which suspend them in anodizing tanks. In the tanks they receive a protective plating to prevent corrosion. Sourced from the Library of Congress.

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Boeing aircraft plant, Seattle, Washington. Production of B-17F (Flying Fortress) bombing planes. Machine screws to be used in building a B-17F (Flying Fortress) are attached to hangers which suspend them in anodizing tanks. In the tanks they receive a protective plating to prevent corrosion. Sourced from the Library of Congress.

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