Based on the Erlang Mountain Tunnel, the paper introduces application of EGM96 in correction of perpendicular deviation in plane network.

基于二郎山隧道工程，介绍了EGM96在平面网中垂线偏差改正的应用。

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Chordal deviation is the perpendicular distance between the actual curve and the approximating line segments.

圆弧可以大量短直线模拟，弦长偏差是圆弧与直线的垂直距离。

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Any deviation from this home position (perpendicular) can be detected quickly and precisely with inclinometers made by the sensor specialist TURCK.

从这个家里的任何位置(垂直)偏差可以快速准确检测的传感器与倾角专家提出图尔克。

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