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物体或形状的横截面必须是圆形的,从另一个方向的横截面是三角形的,从第三方向的横截面是方形的(或矩形)?知道这个物体可能是什么样子吗?
像这样:http: //i.imgur.com/5Bh6o.jpg
这是一些填充物,因为没有足够的字符来提交我的答案。