trirectangular

trirectangular

1. trirectangular quadrilateral

三直角四边形

2. trirectangular spherical triangle

三直角球面三角形

3. trirectangular trihedral

直角三面形

4. The method of reconstructing a trirectangular tetrahedron from a stereo projection made up of two complete quadrangles is put forward.

研究了体视投影的复原问题，提出了根据两个完全四点形为体视投影恢复三直角四面体的方法。