File:Boulton and Watt sun and planet gear.jpg
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:42, 4 August 2008 | 1,536 × 2,048 (294 KB) | Andy Dingley | {{Information |Description={{en|1=Boulton & Watt beam engine of 1788, showing the Watt W:sun and planet gear. http://www.sciencemuseum.org.uk/objects/motive_power/1861-46.aspx}} |Source=Own work by uploader |Au |
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