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单词 transit instrument
释义

WordReference Random House Unabridged Dictionary of American English © 2024
transit in′strument, 
    1. [Astron.]See meridian circle.
    2. [Survey.]transit (def. 6a).
    • 1805–15

Collins Concise English Dictionary © HarperCollins Publishers::
transit instrument n
  1. an astronomical instrument, mounted on an E-W axis, in which the reticle of a telescope is always in the plane of the meridian. It is used to time the transit of a star, etc, across the meridian
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