double beam girder-erecting machine
单梁式架桥机single beam girder-erecting machine 双梁式架桥机double beam girder-erecting machine 组拼式架桥机assembly type girer-erecting machine ..
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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。
The text detailedly introduced crown block, running system, availability work period of bridge girder erection equipment and improve case for precast beams install.
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