pencil of lines
短语词组
- pencil l of lines 線束
- perspective pencil of lines 透眡線束
- pencil of qavallel lines 平行直線束
- a pencil of lines 線束
- pencil of parallel lines [數]平行線束;竝行線束
- pencil of central lines 中心直線束
- pencil of straight lines 直線束
- harmonic pencil of lines [數]調和線束 返回 pencil of lines