The preflex composite girder is a new girdertype that has been successfully used in small span bridges in China in the recent years, and is currently starting to be used in long span bridges.
预弯组合梁是近年在国内采用的新梁型，已经在许多小跨度桥上成功应用，在大跨度桥上也开始付诸实践。
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This paper describes general structure design and structure load test of girdertype railway bridge erecting machine with single simple supported beam and overhead transversely travelling trolley.
本文介绍我国一种新型单梁简支空中横移梁式铁路架桥机的总体结构设计及其结构荷载试验。
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The box type structure, cavity cannot antirust paint corrosion, in order to prevent moisture intrusion corrosion beam cavity, sealing the inner cavity of the main girder must keep.