A practical method for formation of envelope surface is introduced in the paper. And a programmed calculation method for manufacturing integral impeller with a four-coordinate NC miller is presented.
介绍一种形成包络面（等距面）的实用方法，提出一种用四坐标数控铣床加工整体叶轮的程序计算方法。
The invention provides semiconductor solar cells having front surface electrodes and a method for manufacturing the same.
本发明提供一种具有前表面电极的半导体太阳能电池及其形成方法。
In order to support concurrent design and manufacturing, the research focus on sculptured surface interrogation method for visibility direction information in design procedure.
为了支持并行设计与制造，本文研究提取曲面上一点的可行接近方向集合的方法。
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