有内脏与腔壁的腹膜。

There are visceral and parietal peritoneal.

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精密加工的阀杆和填料腔。阀杆和填料腔壁的平直度、圆度和表面光洁度是最基本的要求。

Precision stem and packing Chambers. Straightness, roundness and fine finish of stem and packing chamber wall are essential.

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当薄的衬壳发生屈曲时，由于壳体受到空腔壁的约束，因此它的屈曲行为与一般的壳体屈曲问题不一样。

When it bucks, the buckling of model is different from other shells because it is constrained by the cavum.

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