短語詞組短語bed of absorbent material 吸附劑物料牀;詳細繙譯drainage of bed material 牀料排放amount of bed material 物料量composition of bed material 牀沙級配sorting of bed material 牀沙分選armoring of bed material 牀沙粗化exchange rate of bed material 牀沙交換速率filter bed of double -deck material 雙層濾料濾池non -uniformity of bed material 牀沙非均勻性 返回 bed of material