具体的施工方法就是利用贝雷桁架梁，拼装成双导梁架桥机，加上简单的慢速卷扬机和手拉葫芦等装置，就可以进行钢架拱桥的吊装。
The construction approach is to use the cantilever launching method of the Bailey trussed girder to conduct the hoisting of the steel arch bridge with simple low-speed hoister and manual mini-cranes .
慢速卷扬机