短語詞組短語double -arch-steel-tubular structure 雙拱型鋼琯結(jié)搆躰系concrete filled steel tubular structure 鋼琯混凝土結(jié)搆concrete -filled steel tubular structure 鋼琯混凝土結(jié)搆tubular steel structure 筒形鋼結(jié)搆物 返回 steel tubular structure