The horizontal cross section of the pyramid is square at any level, with each side measuring 229 m (751 ft) in length. The maximum error between side lengths is astonishingly less than 0.1%.
金字塔的水平剖面在任何高度都是正方形，每面的长度也都是229米(751英尺)，惊人地是，其最大的误差小于0.1%。
Antenna measuring is an important method for analysis on its performance, while Radar Cross Section (RCS) measuring has special significance in realm of research on features of target.
天线测量是分析天线性能的一种重要手段。目标的雷达散射截面测量在目标特性研究领域具有重要意义。
The paper introduces a new method of cross measuring by (el ec tric) theodolite, a new way of cross section area computation is also presented.
介绍利用（电子）经纬仪进行横断面测量的一种新方法，并提出横断面截面积计算的一种新思路。
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