Public domain
While construction is underway, the uncompleted sections of the roof must be mobile in order that a perfect fit may be made. Steel rails are laid and the sections of roof mounted upon them, allowing the giant pieces to be moved by a small crew with block and tackle
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Subjects
Credit lineWhile construction is underway, the uncompleted sections of the roof must be mobile in order that a perfect fit may be made. Steel rails are laid and the sections of roof mounted upon them, allowing t. 1939-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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