The probability fatigue life - span of pressure vessel under the action of different cycle load is closely related to the cycle load with high stress.
承受不同循环载荷共同作用的压力容器，其概率疲劳寿命和在高应力水平上的循环载荷有着密切的关系。
Its role is to support a bridge structure, reaction forces transfer to the pier, and to ensure that the bridge span structure under load to meet the design requirements of the deformation.
它的作用是将桥跨结构的支承反力传递给墩台，并保证桥跨结构在荷载作用下能满足设计要求的变形。
Due to the large span of the floor slab, the moment torsion of the beam, under the vertical load, is obvious.
由于板跨较大，竖向荷载使梁截面承受的扭矩较大。
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