... standard of productive forces 生产力标准 range trigonometric leveling 测距三角高程 train 火车 ...
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光电测距三角高程测量 the EDM trigonometric leveling
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.
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