并结合实例，细致的分析了常见的回转体相贯线，为计算机绘图提供了理论依据。
Then combined with teaching example, detailed analysis on intersection curve of normal revolution solid is provided, theoretical basis is advanced for computer graphics.
给绘图机设计方案的修改提供了可靠的理论依据。
This result can be used as a reliable theoretical basis to revise the design scheme of the draughter.
本文介绍依据模具设计中的经验判断和经验公式，开发研制具有推理、计算、绘图功能的设计软件。
Based on the empirical formulas and judgement, a software being capable of inferring, calculating and drawing was developed and introduced in this paper.
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