Home / Standards / GB/T 39203-2020 GB/T 39203-2020 Active Technical specifications for extraction of valuable metals from copper smelting dust 铜冶炼烟灰提取有价金属技术规范 Standard Type GBT ICS 13.030.50 CCS H62 Status 现行 Issue Date 2020-10-11 Implementation 2021-05-01 Responsible Dept 国家标准委 Drafting Unit N/A