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ordnance datum
释义
ordnance datum
ordnance datum
n
(Surveying) mean sea level calculated from observation taken at Newlyn, Cornwall, and used as the official basis for height calculation on British maps. Abbreviation:
OD
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OD
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nwsc
nwsca
nwscc
nwschasn
nwsd
nwsda
nwsdb
nwsds
nwse
nwsed
nwseed
nwseo
nwsep
nwses
nwsf
nwsfo
nwsfpp
nwsg
nwsgc
nwsh
nwsi
nwsia
nwsic
nwsid
nwsk
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更新时间:2026/9/9 14:10:52