查询词典 datum mark

During construction of Donghai Bridge of Yangshan Deep-water Port, bedrock bench mark, which is an important surveying datum mark, played an important part in control survey and elevation transmission.

基岩标是重要的测量基准设施，在洋山深水港东海大桥的工程建设中发挥了控制测量与高程传递的重要作用。

As we known, common Loran - C receiver employs a fixed da- tum - mark in order to avoid interference caused by skywave, as the SNR is often poor at this point due to the amplitude limit of the pulse envelope, so it greatly increases time for tracking the datum - mark.

常规接收机为了防止天波干扰，将基准点设置在一个固定位置上，导致基准点处信噪比受包络限制而较低，从而大大增加了对准基准点的时间。

Any of the Micron tick mark the number of datum Micron are both zero, in short, squeege instrument slot on both sides is a plane?

任一微米刻度线的基准面的微米数是否均为0μm，简言之，刮板仪槽两边是否为平面？

The surface subsidence in the Yellow River delta foreland area brings changes to the land surface height there, and the depth datum in the bathymetric survey is determined on the basis of the level of land bench mark, so the changes in the level of land bench mark will affect the determination of depth datum and the accuracy of bathymetric survey.

国家海洋局，第一海洋研究所，山东青岛 266061文章摘要：黄河三角洲前沿的陆地由于受地面沉降的影响，使地面高程不断发生变化。在水深测量中，深度基准面是根据陆地水准点高程确定的，陆地水准点高程的变化影响深度基准面的确定，从而影响水深测量的准确性。

The surface subsidence in the Yellow River delta foreland area brings changes to the land surface height there,and the depth datum in the bathymetric survey is determined on the basis of the level of land bench mark,so the changes in the level of land bench mark will affect the determination of depth datum and the accuracy of bathymetric survey.

又由于黄河海港附近有一无潮点，其附近的潮汐性质变化大，在黄河三角洲前沿大范围水深测量中，根据测区潮位变化设立足够的验潮站及统一各个验潮站的水尺零点到同一个深度基准面上，是保证水深测量结果可靠的关键。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了