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https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/434558

Mechanical room in the Nathaniel R. Jones Federal Building in Youngstown, Ohio. Original image from Carol M. Highsmith’s America, Library of Congress collection. Digitally enhanced by rawpixel.

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Mechanical room in the Nathaniel R. Jones Federal Building in Youngstown, Ohio. Original image from Carol M. Highsmith’s America, Library of Congress collection. Digitally enhanced by rawpixel.

More