double vacuum process

例句：

1. 1. The double vacuum process is crucial for the purification of gases.
   双真空过程对于气体的净化至关重要。
2. 2. During the double vacuum process, the pressure in the chamber is reduced to a very low level.
   在双真空过程中，腔室中的压力被降低到非常低的水平。
3. 3. The double vacuum process is used in many industrial applications to remove impurities from liquids or gases.
   双真空过程被广泛用于许多工业应用中，用于从液体或气体中去除杂质。