Conclusion the approximate formula of circumferential stress and the absolute error is accepted, which is easy for the application.
结论周向应力的近似公式及其绝对误差的公式简单易行，便于临床应用。
According to the theory of classical mechanics, the problem of stress concentration of open cell of spherical cover end is always solved by approximate computing formula.
由经典力学理论，对于球形封头开孔应力集中问题，大都采用近似计算公式。
According to the theory of classical mechanics, the problem of stress concentration of open cell of spherical cover end is always solved by approximate computing formula.
由经典力学理论，对于球形封头开孔应力集中问题，大都采用近似计算公式。
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