在平板叠加理论的基础上，建立了一个有限长对称矩形压力容器的设计模型，并推导出其侧板厚度的计算公式。
A design model of a finite length rectangular pressure vessel was established based on the plate heap theory, the calculation formula of the side plate thickness was derived.
通过设置不同部分壳体单元的不同厚度，巧妙地处理了车体钢骨架与车体侧墙板及其他各种板件的焊接关系。
We set the thickness of the shell elements of the welding parts of the steel structure of the car body and its sheathings, such as side wall sheathing, as the sum of their thickness.
结论：颊侧骨板的厚度及缺牙位置均有可能影响术后牙槽嵴的改建。
Conclusion: the thickness of buccal bone wall and position of missing tooth, may influence the maxillary alveolar ridge alterations after immediate implantation.
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