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单词
diffusion pump
释义
diffusion pump
noun
:
a vacuum pump for producing extremely high vacuums by diffusing gas into a jet of vapor of mercury or some heavy oil by which the gas is carried off and which is separated from the gas by condensation
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pervasion
pervasive
pervasively
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pervenche
per verba de praesenti
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perverse
perversely
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pervicaciously
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更新时间:2026/11/3 1:18:24