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单词 datum line
释义

datum line


datum line

- The horizontal or base line, from which the heights of points are reckoned or measured, as in the plan of a railway, etc.See also related terms for measured.

datum line


datum line

[′dad·əm ‚līn] (navigation) reference line

reference line

Any line which can serve as a reference or base for the measurement of other quantities.

datum line

A baseline, or reference line, from which calculations or measurements are taken. See datum.
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