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。

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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。

youdao