In this paper, a core program package related for drawing pictures in micro computers with Oriented Geometry is presented to describe profile of machine parts in numerical control.
本文以有向几何为背景陈述一个微机绘图核心程序包，用它描写数控加工零件的平面外型轮廓，并在微机上绘制各种复杂的平面图形。
A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts.
句中不应有赘余之词，段落中不应有赘余之句，就像画作中不应有蛇足之线条，抑或机器不应有多余之零件。
Build up machine spare parts list and drawing.
编制设备备件图册。
A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts.
一个句子不应有废词，一个段落不应有废句，同理，一幅画里不应有多余的线条，一部机器不应有多余的零件。
Applicable to auto mould casting mould casting, heat resistant steel, high impact abrasion of the drawing and pressing machine, welding parts repair coating can be processed.
适用于汽车模具，热坯模，铸钢模耐中高温冲击磨耗之机件延压部分的修补，焊层可加工。
Several important technologies for the software aimed to correcting machine parts drawing were discussed in detail and the solutions were provided also.
对制图作业批改软件的若干关键技术进行了详细分析，并提出了相应的解法。
Several important technologies for the software aimed to correcting machine parts drawing were discussed in detail and the solutions were provided also.
对制图作业批改软件的若干关键技术进行了详细分析，并提出了相应的解法。
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