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Re:到底怎么才算把桌子放平?

Posted by zerocool_08 at 2005-10-05 10:51:28 on Problem 2628
In Reply To:Re:到底怎么才算把桌子放平? Posted by:ready_sun at 2005-10-05 07:58:31 
> 2个脚的间隔?间隔怎么是个度数?
有三个脚组成一个锐角三脚形，或四个脚成一矩形
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