Home / Standards / GB/T 39180-2020 GB/T 39180-2020 Active Guide for circular economy evaluating—Copper smelting industry 循环经济评价 铜冶炼行业 Standard Type GBT ICS 13.020.20 CCS H00 Status 现行 Issue Date 2020-10-11 Implementation 2021-05-01 Responsible Dept 国家标准委 Drafting Unit N/A