In this paper we derive the formula for computing the envelope of a bi-parametric family of surfaces, when they are expressed in parameters.
本文导出了双参数曲面族用参数形式表示时包络面的计算公式。
In this paper we derive the formula for computing the envelope of a bi-parametric family of surfaces, when they are expressed in parameters.
本文导出了双参数曲面族用参数形式表示时包络面的计算公式。
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