Home / Standards / GB/T 3407-2019 GB/T 3407-2019 Active Petroleum xylene 石油混合二甲苯 Standard Type GBT ICS 75.140 CCS E49 Status 现行 Issue Date 2019-10-18 Implementation 2020-05-01 Responsible Dept 国家标准委 Drafting Unit N/A