...t或者SubElement()，前者称作元素的构建函数(constructor)，用以构建任一独存的元素；后者称作元素的制造函数(factory function)，用以制造某一元素的子元素。
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有理曲线和曲面作为一类重要的逼近函数，在计算机辅助设计与制造中有着广泛的应用。
Rational curves and rational surfaces, which are a class of important approximation functions, are extensive applied in CAD/CAM.
根据微型齿轮传动设计与制造的特点，提出了一种设计微型齿轮齿廓曲线的方法，即偏差函数法。
In the light of the characteristics of designing and manufacturing the micro-gear drives, a designing method called deviation function is proposed in this article.
该模型以制造成本与质量损失成本之和为目标函数，以加工能力和功能要求为约束条件。
The object function of the model is the sum of manufacturing cost and quality loss. The machining capability and function requirement were given as the restriction conditions.
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