The engineer drew a diagram of the bridge.

工程师绘制了一幅这座桥的示意图。

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The pipeline bridge is built up with triangle sections, its shear stiffness can be derived from the stress diagram for the truss with triangle section.

在管道跨越工程中，常用三角形截面组合管拱，由三角形截面桁梁的受力分析图，分析推导出其抗剪刚度。

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