短語詞組短語waste concrete as aggregate 廢混凝土骨料recycled concrete coarse aggregate 再生水泥混凝土粗骨料Slag concrete manufactured aggregate 發(fā)明名稱concrete e aggregate 混凝土骨料concrete fine aggregate 混凝土細骨料concrete alkali aggregate reaction 砼堿集料反應(yīng)concrete aggregate separation 骨料分離artificial concrete aggregate 人造混凝土骨料 返回 concrete aggregate