注意：如果水银被真空吸除、接触热源或进入到通风系统，参考大量泄漏指南。
Note: If the mercury was vacuumed, exposed to heat or entered the ventilation system, refer to Large Spill Guidance.
应用流体力学和工业通风原理，分析了罗茨中央真空吸尘系统的管网阻力特性；
Tube Web obstruction property of Roots central vacuum cleaning system is analyzed with fluid mechanics and industry ventilate principle.
这个过程经常伴随着生物通风，并用真空除去蒸气。
Often this process is combined with bioventing, the physical removal of vapors by a vacuum.
环境温度较高时，油温升高，粘度下降，饱和蒸汽增大，会引起极限真空上升，应加强通风散热。
Higher temperature, oil temperature increase, decrease viscosity, steam increased, the limit will cause a vacuum up, we should strengthen the ventilation cooling.
真空机应安装在干燥通风和清洁的场所。
Vacuum machines should be installed in the ventilation and dry cleaning establishments.
真空机应安装在干燥通风和清洁的场所。
Vacuum machines should be installed in the ventilation and dry cleaning establishments.
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