高程差是指通过两点的两个水准面的差距，通过水准测量和三角高程测量方法测定。
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。
To measure the difference in elevation between poles, surveyors used an optical level—a telescope on a level base—placed halfway between the poles.
根据安延管道的地形情况，利用高程差进行了自压输油试验。
According to topographical situation of Yanan Pipeline, conduct dead weight oil transporting test a - gainst elevation difference.
转子磁场中心安装偏差所产生的轴向磁拉力很小，转子磁极中心挂装高程差所产生的不平衡力偶不致增大推力瓦受力。
The couple of force created by rotor pole center suspending difference may not increase the pressure on the thrust pad.
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