Bridge's metal structure from the main beam and side beams, divided into single-and dual-beam bridge girder bridge types.

桥架的金属结构由主梁和端梁组成，分为单主梁桥架和双梁桥架两类。

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The moving grid technique is adopted to simulate the fluid fields around the rigid body such as bridge girder cross-sections.

通过使用动网格技术，可实现对桥梁断面等刚体截面绕流场的模拟。

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The text detailedly introduced crown block, running system, availability work period of bridge girder erection equipment and improve case for precast beams install.

详细介绍了对双导梁式架桥机天车、行走系统、有效工作长度及预制梁安装就位的改进情况。

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As the truck was entering the bridge, its load -- which Rudeen described as an equipment casing form for a drill rig -- hit a support girder, causing the bridge to collapse.

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