短語詞組短語water and cement ratio 水灰比water r cement ratio 水灰比water -cement ratio 水灰比nominal water -cement ratio 名義水灰比total water -cement ratio 縂水灰比net water -cement ratio 淨(jìng)水灰比low water -cement ratio 低水灰比high water to cement ratio 高水灰比real water -cement ratio 真正水灰比 返回 water cement ratio