Home / Standards / GB 28377-2019 GB 28377-2019 Active Minimum allowable values of water efficiency and water efficiency grades for urinals 小便器水效限定值及水效等级 Standard Type GB ICS 91.140.70 CCS Q31 Status 现行 Issue Date 2019-12-31 Implementation 2021-01-01 Responsible Dept 国家标准委 Drafting Unit N/A