GB 25502-2017坐便器水效限定值及水效等级国家标准
英文:Minimum allowable values of water efficiency and water efficiency grades for water closets GB 25502-2017介绍: 国家标准《坐便器水...
英文:Minimum allowable values of water efficiency and water efficiency grades for water closets GB 25502-2017介绍: 国家标准《坐便器水...