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。
As a new installation method for big structures, double girder integral lift is mainly composed of fixed girder, moveable girder, work anchor, moveable anchor, jacks and guide rail.
双梁式整体提升法是一种新型的大型结构安装方法，主要由固定梁、活动梁、钢绞线、工作锚、工具锚、导向装置及千斤顶组成，与现在常用的安装方法相比，具有价廉、安全、高效和易推广等特点。
A systematic study of theoretical methods for predicting ultimate hull girder strength of ships is carried out based on long-time theoretical and experimental work in authors group.
本文在多年船体极限强度理论和试验研究工作的基础上，对船体极限强度分析的理论方法进行深入系统的研究。
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