leveling height difference
leveling height difference
水准高差
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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A new method in this paper is offered to solve the question, which is based on astronomical leveling and USES GPS to measure height anomaly difference between both sides of obstacle.
为解决这一问题，本文提出了一种基于天文水准原理的GPS方法，通过测定障碍物两侧的高程异常差来实现高程传递。
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