But such force is ignored in structure design and strength calculation.

但在筒体结构强度设计计算中此项冲击力是忽略不计的。

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And it is a long standing problem to simplify their strength calculation.

如何对其进行简化计算是一个由来已久的问题。

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And it is a long standing problem to simplify their strength calculation.

如何对其进行简化计算是一个由来已久的问题。

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