利用圆锥三角形边长的几何关系来确定转动角度，可以不用测量仪器加工出圆锥体。
Geometrical relationship among the length of triangle sides is used to determine the Angle of rotation, the cone can be machined without using measuring instrument.
论证了光电测距导线中“等影响”原则的不合理性，提出了角度测量和边长测量的合理精度。
This paper proves the principle of equal influence is unreasonable in electro-optical distance traverses, proposes the reasonable accuracy of angular measure and linear measure.
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