just by pressing a button without the sea horizon to turn to,we should know clearly the relationship between the accuracy of zenith distance observed and the accuracy of a position fixed,the causes of the errors of zenith distance observed,what accuracy of zenith distance observed could be obtained and what accuracy standard should be used.
要在无水天线测天时一按按钮就可定出较精确的船位经纬度,必须弄清天体顶距测量精度对定位精度的影响,弄清顶距测量误差产生的原因,可达到的精度及选用适当的精度标准。
The paper expounds the principle and the method of measuring zenith distance for celestial positioning based on the direction of gravitational force line.
论述了在海上进行天文定位时以重力线作基准直接测定天体顶距的原理和方法。
The pipe driving construction method characteristics,pipe material choice,pipe driving force calculation and apex distance determination,working pit and receiving pit selection and size determination were analyzed.
对顶管施工方法工艺的特点、管材选择、顶力计算和顶距确定、工作坑和接收坑选用及尺寸确定等方面进行了分析,并提出了顶管法施工应注意的一些事项,以推广顶管技术的应用。
In Vitro Study the Distances from the Foramina to the Root Apex and Its Clinical Significance
恒牙根尖孔至根尖顶距离及其临床意义
This distance corresponds to the space between the dimple in the chin and the hair-line.
这个距离与下巴酒窝与发髻顶端的间距相同。
the perpendicular distance from the base of a geometric figure to opposite vertex (or side if parallel).
从几何基准面到顶端的垂直距离。
The construction quality control of long distance and large bore steel pipe driving
长距离大口径钢管顶管施工质量控制
Distance--Interpretation on the Structuralism in A Woman on a Roof
距离——《屋顶丽人》的结构主义解读
Application of Large Diameter & Long Distance Curve Pipe Jacking Technology
大口径长距离急曲线顶管技术的应用
Enter the measurement from the top of the landing to the bottom of the ceiling above the landing.
输入平台顶部到其上方天花板底部的距离。
From the top of the wall there was a sheer drop of100 feet to the water below.
围墙顶部离底部的水垂直距离大约有100英尺。
It is the distance between the base line and the ascender line or cap line.
是从基线到大写顶线或上升笔划线的距离。
It is 19 kilometers long and at one point it's more than 2100 meters under the crest of the mountain.
有19公里长，隧道的某一处距峰顶有2100多公尺深。
Make sure the set-top box remote is less than 1 inch from the remote sensor
确保机顶盒遥控器距遥感器不到1英寸
They could fly long distances through an opposite gale before exhaustion follows.
它们能够顶着大风飞行很远距离才精疲力竭。
It can fly long distances through an opposite gale before exhaustion follows.
它能够顶着大风飞行很远距离才精疲力竭。
A point equidistant from the vertexes of a regular polygon.
中心点，中枢与一正多边形各角顶点等距的一点
Our company is on the cutting edge of telecommunications.
我们公司在远距离通讯方面是处于顶尖位置的。
Prevention and Control of Roof Disasters in Staggered Mining under the Goaf Ultra-close to Seam Being Mined
极近距离采空区下交错开采顶板灾害防治
Settlement Regularity and Control in Large Diameter Long-distance Curve Slurry Pipe Jacking Construction
大直径长距离曲线泥水平衡顶管施工沉降控制
Monitoring and analysis of the impact of small internal tunnel blasting vibration on the hilltop
小净距隧道爆破振动对山顶影响测试与分析