高程差 altitude difference; depth displacement; difference in elevation; difference o ..
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To measure the difference in elevation between poles, surveyors used an optical level—a telescope on a level base—placed halfway between the poles.
为了测量两极之间的高程差，测量员在两极中间的一个水平基座上使用了光学水准望远镜。
There is a big difference in elevation within the site, and its neighboring land is also diverse.
本区域内的地势存在很大差异，其相邻地区的地势也颇不平坦。
Because of large difference in elevation in this district a new technology as setting pressure as zone with direct networking is adopted.
因该区采暖用户高差悬殊较大而不得不采用分区定压直接连网新技术。
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