I coded this file by hand, which is one option, but most people are more comfortable with a 3d drawing program, using X3D to render for the Web.
我是手工编写这个文件的,这是一种选择,但是大部分人更喜欢使用3d绘图程序,并使用X3D呈现给Web。
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。
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