| 单词 | diffusion pump |
| 释义 | diffusion pump(condensation pump) A vacuum pump in which oil or mercury vapour is diffused through a jet, which entrains the gas molecules from the container in which the pressure is to be reduced. The diffused vapour and entrained gas molecules are condensed on the cooled walls of the pump. Pressures down to 10-7 Pa can be reached by sophisticated forms of the diffusion pump |
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