Home / Standards / GB/T 14949.11-2021 GB/T 14949.11-2021 Active Manganese ores—Determination of carbon content—Gravimetric method and infrared absorption method 锰矿石 碳含量的测定 重量法和红外线吸收法 Standard Type GBT ICS 73.060.20 CCS D32 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A