GB 25501-2019水嘴水效限定值及水效等级标准
英文:Minimum allowable values of water efficiency and water efficiency grades for faucets GB 25501-2019介绍: 国家标准《水嘴水效限定值及水效...
英文:Minimum allowable values of water efficiency and water efficiency grades for faucets GB 25501-2019介绍: 国家标准《水嘴水效限定值及水效...