datum line
(transitive) To remove the sourness from; to make no longer sour.
A memory-aid; a reminder or memorandum, especially a book or document serving this purpose. / (diplomacy) A document circulated in a meeting or summit for discussion purposes.
(engineering) A line which serves as a reference or base for the measurement of other quantities.
around, surrounding
測量士は現場の全ての標高測定の基準として基準線を使用した。
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