mercury vapour pump
(US mercury vapor pump)
noun
A pump which produces a high vacuum by entraining molecules of the gas to be evacuated in a jet of mercury vapour.
Origin
1920s.
| 单词 | mercury vapour pump |
| 释义 | mercury vapour pump(US mercury vapor pump) noun A pump which produces a high vacuum by entraining molecules of the gas to be evacuated in a jet of mercury vapour. Origin |
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