Home / Standards / GB 21521-2014 GB 21521-2014 Active Minimum allowable values of energy efficiency and energy efficiency grades for copy machines, printers and fax machines 复印机、打印机和传真机能效限定值及能效等级 Standard Type GB ICS 27.010 CCS F01 Status 现行 Issue Date 2014-04-28 Implementation 2015-01-01 Responsible Dept 国家标准委 Drafting Unit N/A