partial vacuum
noun1
A region of low atmospheric pressure, especially one in which most of the air has been pumped out.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
A region of low atmospheric pressure, especially one in which most of the air has been pumped out.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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