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Re:讲几个问题

Posted by supersl at 2012-04-09 17:23:26 on Problem 1070
In Reply To:讲几个问题 Posted by:aoxboxcox at 2009-02-27 09:50:24 
"At any instant, assume that changing the position of the center of gravity in any direction for at most 10-5 units, does not affect the stability of the wheel. "
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