投影线 tóuyǐngxiàn projection line Definitions Defs Origin Strokes Stroke Words Sentences Sents 投影线 投影線 tóuyǐngxiàn projection line the line along which an object is projected onto a surface; line of projection
投影线 投影線 tóuyǐngxiàn projection line the line along which an object is projected onto a surface; line of projection
