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Re:到底怎么才算把桌子放平?

Posted by DS_HCP at 2005-10-04 10:58:02 on Problem 2628
In Reply To:到底怎么才算把桌子放平? Posted by:shnu1 at 2005-10-03 11:25:15 
桌子的脚不能在一边，也就是说2个相邻的脚之间的间隔不能大于等于180度
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