Home / Standards / GB/T 2285-1993 GB/T 2285-1993 Abolished Coking xylene 焦化二甲苯 Standard Type GBT ICS 71.080.15 CCS G18 Status 废止 Issue Date 1993-03-31 Implementation 1993-12-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A