1.
Specifications for the third and fourth order leveling
GB12898-1991国家三、四等水准测量规范
2.
The paper expounds the principle of triangular elevation surveying and its accuracy, and further presents the accuracy norm for 4(superscript th) grade of leveling surveging.
阐述全站仪三角高程测量的原理及精度，在此基础上得出达到四等水准测量的精度要求。
3.
The discuss of the precision in the GPS height replacing the 4 and 5 grade leveling
GPS测高技术代替四、五等水准测量精度探讨
4.
On the Key Problems of the Third Stage National First-order Levelling
国家三期一等水准测量若干问题的研究
5.
Research on Trigonometric Leveling to Replace Second-Class Leveling in Mountain Areas
用三角高程代替山区二等水准测量方法研究
6.
Application and Research of Precise Trigonometric Leveling in Second Leveling in Mountainou Area along Passenger Dedicated Line
精密三角高程测量在客运专线山区二等水准测量中的应用研究
7.
Automatic level and high-grade level survey as well as deformation monitoring
自动安平水准仪与高等级水准测量和变形监测
8.
Technology of Total Station Instrument Precise Trigonometric Leveling used for Second-Grade-Leveling Elevation Survey
全站仪精密三角高程法用于二等水准测量的技术
9.
Application of Precise Triangle Height in Second Order Leveling of Dayaoshan Tunnel
精密三角高程在大瑶山隧道二等水准测量中的应用
10.
Implementation of National First Order Leveling using High Accuracy Electronic Level
利用精密电子水准仪进行国家一等水准测量
11.
Specification for the first and second order leveling
GB12897-1991国家一、二等水准测量规范
12.
The Application of Trigonometric Leveling and GPS in River-crossing Leveling
三角高程、GPS在跨河水准测量的应用
13.
Precision Analysis of Total Station Trigonometric Leveling Replace Leveling
全站仪三角高程测量替代水准测量的精度分析
14.
surveyor's level
(矿坑)测量水准器
15.
To measure the different elevations of(a tract of land)with a level.
测量水平用水准仪对（土地）做水准测量
16.
Design of Grade Leveling Recording Software Based on Excel VBA
基于Excel VBA的等级水准测量记录软件设计
17.
Research and Application of Leveling-like Trigonometric Leveling using Total Station
全站仪水准式三角高程测量的研究与应用
18.
accurate statistics, measurements, calculations, etc
准确的统计、 测量、 计算等