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Use this page to browse objects in the Smithsonian Institution Collections. You can also browse additional options using the list menu above. Current result set: 1 documents
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Air locks (Chambers)
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Bridges
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Caissons
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Canals
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Concrete
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Concrete construction
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Dams
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Derricks
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Engineers
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Engines
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Hydraulic engineering
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Lifting-jacks
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Mine shafts
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Pumping machinery
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Railroad bridges
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Railroads
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Roads
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Subways
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Tunnels
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Turbines
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Underwater tunnels
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Waterways