Predating CAD, this geometric linear- and arc-based approach evolved out of the mental constructs of design technique, industrial fabrication, and reproduction of the objects of the 20th Century.
由我们心中所想衍生出的，几何化的直线、曲线为基础的早期CAD，决定了整个20世纪的设计技术，工业生产和物品的复制和再生产。
An approach to extract feature points on the boundary based on length of arc is proposed in view of the key problem of measuring composite-shape parts.
针对组合形状零件几何尺寸测量中的关键问题—轮廓识别，提出了一种基于弧长的轮廓特征点提取的方法。
This presents an approach for process design of plasma arc forming of thin plates.
平面薄板的等离子弧成形提出了一种有效实用的工艺方法。
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