- 投影仪 tóuyǐngyí projector
- 投影片 tóuyǐngpiàn slidea slide used in a presentation (Taiwan usage)
- 正投影 zhèngtóuyǐng orthogonal projection
- 投影面 tóuyǐngmiàn projection planeplane of projection (in perspective drawing)
- 斜投影 xiétóuyǐng oblique projection
- 投影机 tóuyǐngjī projector
- 投影几何 tóuyǐngjǐhé projective geometry
- 投影线 tóuyǐngxiàn projection lineA line used in geometry or technical drawing to project a point onto a plane or surface.
- 投影几何学 tóuyǐngjǐhéxué projective geometry
- 投影中心 tóuyǐngzhōngxīn projection centercenter of projection
- 投影图 tóuyǐngtú projection drawingperspective drawing; projection chart
