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.

基巖標(biāo)是重要的測(cè)量基準(zhǔn)設(shè)施，在洋山深水港東海大橋的工程建設(shè)中發(fā)揮了控制測(cè)量與高程傳遞的重要作用。

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.

常規(guī)接收機(jī)為了防止天波干擾，將基準(zhǔn)點(diǎn)設(shè)置在一個(gè)固定位置上，導(dǎo)致基準(zhǔn)點(diǎn)處信噪比受包絡(luò)限制而較低极品孕妇无码视频在线第一页，從而大大增加了對(duì)準(zhǔn)基準(zhǔn)點(diǎn)的時(shí)間。

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?

任一微米刻度線的基準(zhǔn)面的微米數(shù)是否均為0μm国产乱子伦真实视频在线观看，簡(jiǎn)言之性欧美69式XXXX，刮板儀槽兩邊是否為平面？

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.

國(guó)家海洋局18岁黄直播件永久看的，第一海洋研究所comwww啊好大轻点，山東青島 266061文章摘要：黃河三角洲前沿的陸地由于受地面沉降的影響，使地面高程不斷發(fā)生變化福利国产在线。在水深測(cè)量中欧美精品亚洲精品日韩传电影，深度基準(zhǔn)面是根據(jù)陸地水準(zhǔn)點(diǎn)高程確定的，陸地水準(zhǔn)點(diǎn)高程的變化影響深度基準(zhǔn)面的確定国产区在线，從而影響水深測(cè)量的準(zhǔn)確性亚洲色图欧美色图另类图片。

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.

又由于黃河海港附近有一無(wú)潮點(diǎn)，其附近的潮汐性質(zhì)變化大在线电影你懂的0，在黃河三角洲前沿大范圍水深測(cè)量中欧美瑟瑟网站，根據(jù)測(cè)區(qū)潮位變化設(shè)立足夠的驗(yàn)潮站及統(tǒng)一各個(gè)驗(yàn)潮站的水尺零點(diǎn)到同一個(gè)深度基準(zhǔn)面上，是保證水深測(cè)量結(jié)果可靠的關(guān)鍵japan黄片在线看。