| 单词 | vacuum pump |
| 释义 | > as lemmasvacuum pump vacuum pump n. a pump for evacuating a container of air or other gas. ΘΚΠ society > occupation and work > equipment > pump > [noun] > pumps for producing vacua vacuum pump1858 mercury pump1869 pulsometer1873 mercury vapour pump1926 roughing pump1958 1858 P. L. Simmonds Dict. Trade Products Vacuum-pump, a pump attached to a marine steam-engine. 1882 Chem. News 27 Oct. 192/1 In the machine in question the refrigeration is effected simply by the evaporation of water under a special vacuum-pump. 1979 J. Matley Fluid Movers v. 267/1 A good seal between the inlet and outlet sides is essential in all mechanical vacuum pumps. < as lemmas |
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