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filter pump

a vacuum pump used to assist laboratory filtrations in which a jet of water inside a glass tube entrains air molecules from the system to be evacuated
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Historical Examples
  • Air is often partially exhausted from receivers or vessels by the use of a filter pump or aspirator.

    Physics Willis Eugene Tower

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