Use no oil vacuum pump, avoid polluting the environment in the production.
使用无油真空泵，避免污染环境的生产。
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。
This sophisticated mechatronics products, in a vacuum apart from the application of molecular pump, but also the military, aerospace, oil, petrochemical, energy and other areas has broad prospects.
这种精密的机电一体化产品，除了在真空分子泵中应用外，还在军工、航天航空、石油石化、能源等领域有着广阔的前景。
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