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本帖最后由 confused-maoan 于 2018-1-8 19:33 编辑 & A( |- f* m" F7 h e9 j6 b" n
4 j( w; I: F/ y+ T6 n1 l7 T2 n我的理解是 :当移除closure后,开孔面积 肯定是要大于passage,而这段文字说不能大于passage
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