Home / Standards / GB/T 3714-2017 GB/T 3714-2017 Active Manganese carbonate ore 碳酸锰矿 Standard Type GBT ICS 73.060.20 CCS D52 Status 现行 Issue Date 2017-07-12 Implementation 2018-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A