Home / Standards / GB/T 14949.12-2021 GB/T 14949.12-2021 Active Manganese ores—Determination of combined water content—Gravimetric method 锰矿石 化合水含量的测定 重量法 Standard Type GBT ICS 73.060.20 CCS D32 Status 现行 Issue Date 2021-05-21 Implementation 2021-12-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A