也许我会加入“误差因素”，和 delta 一起来确定是等腰三角形还是等边三角形。

Perhaps I will want to add a "fuzz factor" with deltas for determining whether I have an isosceles or equilateral triangle, respectively.

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本文采用导向联系三角形观测方法，导出了矿井定向角度的误差计算公式。

This paper educed the error calculation formula of the mine directional Angle by using the method of guidance relation connected with the triangle observation.

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讨论线性三角形单元对曲边区域上半离散格式下抛物问题的有限元误差分析。

In this paper the linear triangular finite element approximation to the Parabolic Problem in the domain with curved boundaries is studied.

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