In order to minimize oil vapor migration, some lyophilizers are designed with a tortuous path between the vacuum pump and chamber.

为了最小化油蒸汽的回流，一些冻干机在真空泵和前箱间设计了弯曲的管路。

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In this paper, the maintenance of vacuum system of ICP, Repair of light cabinet, correction of light path, upgrade of computer and operation system of ms-dos were described in detail.

详细描述了ICP真空系统的维护，光室内部的检修及光路的校正，电脑的升级及操作系统MS—DOS系统的升级。

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The molecular distillation (short-path distillation or unobstructed distillation) is a special separation technique of liquid-liquid and a special distillation technique under the high vacuum.

分子蒸馏是一种在高真空下进行的特殊蒸馏技术。

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Despite the fact that it is probable that a black hole lurks at the centre of our Milky Way galaxy, astronomers still know very little about these celestial monsters which vacuum up almost everything in their path, even light.

BBC: Black holes reveal more secrets