pencil of lines

短语词组

短語

• 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
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