“principal vanishing point”的概念、定义、翻译、参考文献-科学参考

单词	principal vanishing point
释义	principal vanishing point Encyclopedia 工学航摄像片释 principal vanishing point主合点在倾斜像片的主垂面内，过摄影中心作与摄影方向线的平行线，与像片主纵线的交点。
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