单词 | paternoster pump |
释义 | paternoster pumpnoun A kind of chain-pump in which a succession of discs or rags is fixed to an endless chain that passes upwards through a tube whose lower end is in water, the discs or rags forming a seal against the tube so that they lift water up inside it. OriginLate 19th century; earliest use found in Edward H. Knight (1824–1883), patent lawyer and expert in mechanics. |
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