短語詞組短語lean mix concrete 少灰混凝土;貧混凝土porous lean cement concrete 多孔貧混凝土lean pumice concrete 貧漿浮石混凝土slipform lean concrete base 滑模貧混凝土基層lean concrete base lcb 貧混凝土基層rolling lean concrete base 碾壓貧混凝土基層lean concrete base 貧混凝土基層lean concrete grout 水泥素漿lean concrete underlayer 貧混凝土墊層 返回 lean concrete