Image: Completed Arch, I-Beam Centers and Top of Center Core
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Description: Completed Arch, I-Beam Centers and Top of Center Core. vol XLII no 11 page 329
Title: Completed Arch, I-Beam Centers and Top of Center Core
Credit: Railway Gazette
Author: uncredited staff writer(s), photographer(s), and illustrator(s)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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