“vacuum pump”的概念、定义、翻译、参考文献-科学参考

　

单词	vacuum pump
释义	vacuum pump Physics A pump used to reduce the gas pressure in a container. The normal laboratory rotary oil-seal pump can maintain a pressure of 10⁻¹ Pa. For pressures down to 10⁻⁷ Pa a diffusion pump is required. Ion pumps can achieve a pressure of 10⁻⁹ Pa and a cryogenic pump combined with a diffusion pump can reach 10⁻¹³ Pa. Chemistry A pump used to reduce the gas pressure in a container. The normal laboratory rotary oil-seal pump can maintain a pressure of 10⁻¹ Pa. For pressures down to 10⁻⁷ Pa a diffusion pump is required. Ion pumps can achieve a pressure of 10⁻⁹ Pa and a cryogenic pump combined with a diffusion pump can reach 10⁻¹³ Pa. Chemical Engineering A type of pump used to reduce the pressure of a gas. Rotary pumps can readily achieve pressures of 0.1 Pa. For very low pressures down to 10^–7 Pa, a diffusion pump is required. Ion pumps and cryogenic pumps can achieve even lower pressures of 10^–9 Pa and 10^–13 Pa, respectively.
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