Fan regulation, which box on the bed material to maintain the upper-vacuum, maintain good dry environment and prevent dust leakage.

调节引风机，使上箱体中床层物料上部保持微负压，维持良好的干燥环境并防止粉尘外泄（略）。

youdao

And the current investigative powers for the control of the rules are often vague and lack, easily lead to the investigation of the flaws of the legal regulation of the vacuum system.

而且我国当前对于行政调查权力控制的法律规范往往比较缺乏且具有模糊性倾向，容易导致对瑕疵行政调查行为的法律规制的真空。

youdao

The oxygen regulation is sum up, which is used for the RH TB vacuum treatment and the proper parameters are found out after several operational tests.

对RH- TB真空处理设备的氧气使用工艺进行了总结，并在实践的基础上探索了合理的工艺参数。

youdao

It emerged from interviews with media professionals and activists in Thailand that media accountability systems like the Press Council and journalist associations cannot be effective alone in a vacuum in the absence of awareness on the importance of self regulation among journalists and editors.

UNESCO: Communication and Information