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Deirdre
www.8625plus2.com, "Non-circular gears and planetary gear", YouTube (1:04) - http://www.youtube.com/watch...
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August 31, 2008
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Unusually-shaped gears in motion; quite mesmerising to watch. (2.5 MB; via Uncertain Times: < http://un-certaintimes.blogspot.com/2008... >)
- Deirdre