“closed leveling line”的概念、定义、翻译、参考文献-科学参考

单词	closed leveling line
释义	closed leveling line Encyclopedia 工学水准测量释 closed leveling line闭合水准路线起止于同一已知水准点的环形水准路线。即由水准原点或某个已知高程的水准点出发，沿拟定的水准路线进行水准测量，最后回到原来的水准点上。
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