Home / Standards / GB/T 39168-2020 GB/T 39168-2020 Active Guidelines for circular economy practical technologies in iron and steel industry 钢铁行业循环经济实践技术指南 Standard Type GBT ICS 13.020.20 CCS Z04 Status 现行 Issue Date 2020-10-11 Implementation 2021-05-01 Responsible Dept 国家标准委 Drafting Unit N/A