How to calculate the contraction stress of semi-rigid pavement is the precondition to solve the problem.
而如何正确计算半刚性基层的收缩应力，则是解决这一问题的前提。
Coating and the substrate surface temperature of the coating would have a bad contraction stress, caused by cracking and peeling off the coating.
涂层与基体表面的温度差会使涂层产生收缩应力，引起涂层开裂和剥落。
Objective To study the significance of the contraction stress test (CST) on the method of delivery for patients with encirclement of fetal umbilical cord.
目的探讨多阶段CST试验对脐带缠绕病人分娩方式的指导意义。
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