File:PSM V20 D325 Mechanism of the pneumatic dial.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 23:07, 22 August 2010 | 1,099 × 872 (125 KB) | Ineuw | {{Information |Description = Mechanism of the pneumatic dial |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_20.djvu/325 |Date = 1881-1882 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category:Popul |
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