A double casing sealed structure is used in the ionization chamber with thin Windows of large diameter.
电离室采用大口径双重密封结构，制作工艺难度大，要求高。
Features: fully sealed, arbitrary curved telescopic, pipe diameter and length does not limit the size can be customized.
特点：完全密封，任意弯曲伸缩，管的直径和长度不限大小都可以定做。
The influence of pneumatic pressure, sealed pressure and axial diameter on normal contact stress was discussed.
讨论了充气压力、密封压力与充气压力比、轴径对法向接触应力的影响。
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