bridge-girder erection machine

• 架桥机

bridge-girder erection machine的用法和样例：

例句

1. The author then explains the basic principle of this project and lists problems to be settled while designing the bridge girder-erecting machine and girder vehicle.
   经过多种方案的比较和分析，认为运梁车，架桥机施工方案为最佳。