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zenith tube
meaning in English
天顶筒
天顶仪
Examples
Photographic
zenith tube
摄影天顶管
Related Words
zenith maschinenfabrik
zenith instrument
zenith astrograph
astronomical zenith
true zenith
ellipsoidal zenith
zenith discontinuity
zenith corp
zenith measurement
zenith projection
zenith star
zenith telescope
zenith-angle distribution
zenith-angle effect
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