短語詞組短語arch -rib tied bridge 拱肋系桿拱橋special -shaped spatial combination arch-rib 異形空間組合拱肋braced -rib arch 桁助拱non -uniform arch rib 變截面肋steel -pipe arch rib 鋼管拱肋slab -rib arch bridge 板肋拱橋dumbbell -shaped arch rib 啞鈴形拱肋 返回 arch rib