Home / Standards / GB/T 2290-2012 GB/T 2290-2012 Active Coal tar pitch 煤沥青 Standard Type GBT ICS 71.080.99 CCS G18 Status 现行 Issue Date 2012-11-05 Implementation 2013-06-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委