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.
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
5.
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
6.
Specification for the first and second order leveling
GB12897-1991国家一、二等水准测量规范
7.
surveyor's level
(矿坑)测量水准器
8.
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
9.
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
10.
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
11.
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
12.
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
13.
accurate statistics, measurements, calculations, etc
准确的统计、 测量、 计算等
14.
International hydrographic positioning standard
国际水道测量定位标准
15.
Applied Study of Substituting GPS Elevation for Fourth-grade-leveling Elevation
GPS高程代替四等水准高程的应用研究
16.
Abstract: The paper introduces second-class sea-crossing leveling put into practice in Xiamen Haicang bridge.
文摘:介绍了二等跨海水准测量厦门海沧大桥的实施情况.
17.
Improving specifications for the first and second order leveling
《国家一、二等水准测量规范》存在的问题及修改意见
18.
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