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单词 ordnance datum
释义

ordnance datum


noun

mean sea level calculated from observation taken at Newlyn, Cornwall, and used as the official basis for height calculation on British mapsAbbreviation: OD

Words nearby ordnance datum

ordinary wave, ordinate, ordination, ordn., ordnance, ordnance datum, Ordnance Survey, ordo, Ordóñez, ordonnance, Ordos
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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更新时间:2024/12/23 13:38:54