发布时间:2025-02-06 17:09:16
椭圆周长公式:L=2πb+4(a-b)
椭圆周长定理:椭圆的周长等于该椭圆短半轴长为半径的圆周长(2πb)加上四倍的该椭圆长半轴长(a)与短半轴长(b)的差。
cad立面图和剖面图不理解是从哪看的如果绘一个大厅怎么画剖面图
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