Ventilation of starting rotation device ventilation pipe is from Axial flow of swirl hole inner surface takes air leads to vacuumcavity, model existence of scale effect.
起旋室通气井通风系由旋流洞内表面轴向水流“挟带”空气而致空腔内气体压强减小进入，模型存在缩尺效应。
2
The cause for corrosion-induced failure of inner cavity of pulsation vacuum sterilizer was analyzed through physical and chemical inspection, macroscopical and microscopical examination.
通过理化检验和宏微观检查，分析了脉动真空灭菌器内腔开裂失效的原因。
3
The larger hollow inner cavity has the similar function as Vacuum Flask, playing a role of good insulation.