Home / Standards / GB/T 6699-2015 GB/T 6699-2015 Active Coking naphthalene 焦化萘 Standard Type GBT ICS 71.080.15 CCS G16 Status 现行 Issue Date 2015-10-09 Implementation 2015-12-01 Responsible Dept 国家标准委 Drafting Unit N/A