The geoid is also used as a reference surface from which to map the topographical features on the planet.

本次制作的地球水准面模型在绘制地球地貌时也将会被用来参考。

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Examples of parameters are: dimensions used to create model features, material density, formulas to describe swept features, imported data (that describe a reference surface, for example).

参数的例子有：用于创建模型特征的尺寸，材料密度，描述扫掠特征的公式，引入的数据(例如，描述参照曲面的数据)。

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Continuous 5 axis machining USES either a reference surface, or two contours (which must have the same number of points) or a contour and a point.

连续五轴加工利用一参考曲面、或两个具有相同数目点的轮廓、或一轮廓一点。

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Continuous 5 axis machining USES either a reference surface, or two contours (which must have the same number of points) or a contour and a point.

连续五轴加工利用一参考曲面、或两个具有相同数目点的轮廓、或一轮廓一点。

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