| 单词 | mercury vapour pump |
| 释义 | > as lemmasmercury vapour pump mercury vapour pump n. a pump which produces a high vacuum by entraining molecules of the gas to be evacuated in a jet of mercury vapour. ΘΚΠ society > occupation and work > equipment > pump > [noun] > pumps for producing vacua vacuum pump1858 mercury pump1869 pulsometer1873 mercury vapour pump1926 roughing pump1958 1926 J. H. Smith tr. L. Dunoyer Vacuum Pract. i. 42 In mercury vapour pumps the size of the orifice through which the vapour is driven is..of secondary importance. 1966 H. Adam & J. Edwards tr. K. Diels & R. Jaeckel Leybold Vacuum Handbk. i. vi. 90 Special forms of cold traps with maximum practicable conductivity have been designed for large mercury vapour pumps. < as lemmas |
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