大跨度钢筋混凝土箱形拱桥
long-span concrete arch bridge
大跨径箱形拱桥
box arch bridge with large span
钢筋混凝土箱形拱桥
RC box girder arch bridge
reinforced concrete box arch bridge
钢箱拱肋
steel box girder arch rib
steel box arch ribs
steel box arch rib
steel box arch
双陀螺形拱肋
dual-gyre-shaped arch rib