Home / Standards / GB/T 2285-2018 GB/T 2285-2018 Active Coking xylene 焦化二甲苯 Standard Type GBT ICS 71.080 CCS G18 Status 现行 Issue Date 2018-05-14 Implementation 2018-12-01 Responsible Dept 国家标准委 Drafting Unit N/A