50m simply supported box girder
60 m precast concrete box girder
a box girder with construction defects
a curved box girder bridge
abnormity steel box girder
arch continuous box girder bridges
block curved box girder
box girder
箱梁
箱型主梁
箱型截面
箱形大梁
空心梁
箱形梁
混凝土箱梁
钢箱梁
箱形主梁
低高度箱梁
密接架欀巷道
组合箱梁
拱箱
箱型梁
预应力混凝土箱梁
纵向箱形梁
连续箱梁
铁路桥
整孔箱梁
箱形桁
箱形桁材
箱梁桥
箱形截面
箱拱
Box Girder Construction