采用对向测距三角高程联合二等水准进行标志的高程测量。
Subtending distance measurement trigonometric leveling uniting second-class leveling is adopted to measure height.
在光电测距三角高程测量中，大气折光对观测量的影响是一个非常棘手的问题。
The effect of atmospheric refraction error on observed value is a very thorny problem in EDM trigonometric leveling.
采用测距三角高程法进行跨河水准测量，可以不量取仪器高，但观测值中有两类不同的观测量。
When completed river crossing leveling by means of trigonometric leveling with distance measurement, there are two types of observed values.
采用测距三角高程法进行跨河水准测量，可以不量取仪器高，但观测值中有两类不同的观测量。
When completed river crossing leveling by means of trigonometric leveling with distance measurement, there are two types of observed values.
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