The influence of pneumatic pressure, sealed pressure and axial diameter on normal contact stress was discussed.

讨论了充气压力、密封压力与充气压力比、轴径对法向接触应力的影响。

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Then, normal contact stiffness and shear contact stiffness of sand particles are derived according to researches above.

在砂土颗粒接触模型的基础上推导出砂土颗粒法向接触刚度、切向接触刚度的表达式。

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Conclusions:There is a normal contact area between the inner surface of lateral femoral tendon and lateral femur condylar to reduce the contact pressure of the lateral surface of patella.

结论：①在正常情况下股外侧肌腱内面与股骨外侧髁存在着接触，这可能是缓解髌骨外侧关节软骨面压力的正常接触；

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"One of the principal concerns that men considering teaching feel is the worry that they will fall foul of rules which make normal contact between adults and children a legal minefield, " he said.

BBC: One in four primary schools still has no male teachers

And there is no known case, at least not known to me, of cancer being transferred from one human to another during normal physical contact.

NPR: Startling New Evidence Cancer Is Contagious

Ronaldsway airport is open as normal but passengers are being advised to contact their airline for updates.

BBC: Isle of Man snow leads to overnight road closures