Home / Standards / GB/T 39178-2020 GB/T 39178-2020 Active Guideline for optimization of circular industrial chains in industrial parks 工业园区循环产业链优化导则 Standard Type GBT ICS 13.020.10 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