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单词 vacuum gauge
释义

WordReference Random House Unabridged Dictionary of American English © 2024
vacuum gauge′, 
  1. Physicsa device for measuring pressures below atmospheric pressure in the receiver of an air pump, in steam condensers, and the like.
  • 1860–65

Collins Concise English Dictionary © HarperCollins Publishers::
vacuum gauge n
  1. any of a number of instruments for measuring pressures below atmospheric pressure
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