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steel-concrete composite girder
bridg.constr. 钢-混凝土结合梁
tech. 钢筋混凝土合成梁; 钢筋混凝土组合梁; 钢材混凝土组合梁; 钢-混凝土组合梁
steel-concrete composite girder: 4 phrases in 2 subjects
Bridge construction2
Technology2