| 单词 | paternoster pump |
| 释义 | > as lemmaspaternoster pump paternoster pump n. 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. ΚΠ 1874 E. H. Knight Amer. Mech. Dict. I. 520/1 When packed pistons are used, they are termed paternoster pumps, from the resemblance of the chain and buttons to the rosary. 1965 J. Needham Sci. & Civilisation in China ii. 350 This..had long existed under the name of the ‘paternoster pump’ or ‘rag-and-chain pump’. < as lemmas |
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