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U.S. Department of the Treasury: vertical-stairwell-scaffolding
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U.S. Department of the Treasury: west-stairs-scaffolding
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U.S. Department of the Treasury: Historic Restoration of the Treasury Stairwells
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U.S. Department of the Treasury: Historic Restoration of the Treasury Stairwells
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U.S. Department of the Treasury: Historic Restoration of the Treasury Stairwells
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U.S. Department of the Treasury: Historic Restoration of the Treasury Stairwells
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U.S. Department of the Treasury: Historic Restoration of the Treasury Stairwells
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U.S. Department of the Treasury: Historic Restoration of the Treasury Stairwells