File:STL Tunnel Ventilation Shaft Diagram.png
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Summary
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Published in 1882 in Scientific American.
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 | This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:21, 11 November 2024 | | 2,805 × 2,227 (2.91 MB) | Lightmetro (talk | contribs) | Published in 1882 in Scientific American. |
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