precision leveling

According to the high demand of modern war to the viability of missilery weapons, the enhancement of launching pad leveling precision and velocity accounts for great significance. A new all-purpose hydraulic control system was designed based on the study of the general leveling principle.

为了提高导弹发射台调平的精度和速度，笔者在对一般性的调平原理进行研究的基础上，设计了一种通用的发射台调平液压控制系统；

In order to increase the efficiency and precision of eveling operation of track dozer, a track dozer model with blade moving straight forward was presented. A crawler dozer model with terrain sensing device was further designed on its basis, and a longitudinal leveling principle was suggested.

为提高履带式推土机平地作业的效率和精度，本文在提出表示铲刀纵前向运动的履带式推土机模型的基础上，进一步设计出带地形探测器的履带式推土机模型，并据此提出纵向找平原理。

When surveying major diameter and higher hanging pipeline, common trigonometric leveling can't meet precision requirement, but tangent method surveying can meet precision requirement.

在悬空管线测量中，对于管径大、悬空高的管线，用普通三角高程法测量很难满足精度要求，而用切线法测量则很容易达到精度要求。

Compared with the traditional methods of geodetic survey, such as Leveling, bedrock bench mark, GPS, etc., InSAR interferometric techniques can obtain high spatial resolution surface deformation details in the large-scale, which precision can reach to the centimeter level.

相对于水准测量、分层标、GPS等传统大地监测方法，InSAR干涉测量技术可以大范围获取高时、空分辨率的地表形变细节信息，精度可达到厘米级。

Use: Test the flatness of plate, leveling ruler, machine tool working platform, guides and precision work-piece.

用途: 检测平板 、 平尺 、 机床工作台 、 导轨和精密工件的平面度、直线度.