一种包络线指标源码。在几何学，某个曲线族的包络线(Envelope)，是跟该曲线族的每条线都有至少一点相切的一条曲线。(曲线族即一些曲线的无穷集，它们有一些特定的关系。在力学中由多个极限莫尔应力圆所确定的岩石的应力应变关系的曲线，该包络线形

Packet : Envelopes包络线指标的计算方法.txt filelist

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