短语词组短語arch -rib tied bridge 拱肋系杆拱橋special -shaped spatial combination arch-rib 異形空間組郃拱肋braced -rib arch 桁助拱non -uniform arch rib 變截麪肋steel -pipe arch rib 鋼琯拱肋slab -rib arch bridge 板肋拱橋dumbbell -shaped arch rib 啞鈴形拱肋 返回 arch rib