regular tetrahedron 具有四个面的正多面体
unit regular tetrahedron 单位正四面体
Regular Tetrahedron Map 正四面体映射
near regular tetrahedron 近正四面体
regular tetrahedron group 正四面体群
co-edge regular tetrahedron 共棱正四面体
This paper tries to generalize the throwing objects from the one dimension pin to the convex curve in two dimension, and even the three dimensional regular tetrahedron and regular hexahedron .
在蒲丰投针问题的基础上，把投掷物由一维的针推广到二维的凸曲线，三维的正四面体、正六面体；
The typical 3d visually modeling methods of geological structure include the 3d regular network model, the TIN surface model, the tetrahedron elements model and the integration model.
建立地质构造三维可视化模型的典型方法包括三维规则网格法、TIN表面法、四面体法以及综合法。
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