短語詞組短語simply -supported steel truss girder bridge 簡支鋼桁梁橋railway concrete simply -supported girder bridge 鉄路混凝土簡支梁橋whole -span simply-supported box girder 整孔簡支箱梁Simply Supported U -shaped Girder 簡支槽形梁simply supported T -type girder 簡支T 返回 simply-supported girder