英语词汇“ordnance datum”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	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 EncyclopediaSeeOD
随便看	directional sound amplification system directional spectral wave generator directional stability directional structure directional survey log directional tactics directional trading directional transmission directional vacuum-assisted biopsy directional/vertical gyros directional weakness directional well direction aménagement et transport du département direction and control exercise direction and inclination direction angle direction/angle direction angles direction a rappel asservi direction assistée direction associates inc direction associée des musées municipaux direction-based location update direction-biased motion estimation direction cantonale de l'etat civil

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