短语词组短語steel for bridge 橋梁用鋼steel temporary bridge 鋼便橋Upper Steel Arch Bridge 上鋼拱橋continuous steel truss bridge 連續鋼桁粱橋steel hanging bridge 鋼吊橋steel beam bridge 鋼梁橋steel access bridge 鋼引橋steel pipe bridge 鋼琯橋 返回 steel bridge