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Juan-Carlos Gandhi ([personal profile] juan_gandhi) wrote2010-01-07 04:44 pm
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[identity profile] ygam.livejournal.com 2010-01-08 12:51 am (UTC)(link)
http://mathworld.wolfram.com/ReuleauxTriangle.html

[identity profile] ostapru.livejournal.com 2010-01-08 06:54 pm (UTC)(link)
Мне это кое что напомнило:
http://en.wikipedia.org/wiki/Wankel_engine
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