Home / Standards / GB/T 3654.3-2019 GB/T 3654.3-2019 Active Ferroniobium—Determination of silicon content—Gravimetric method 铌铁 硅含量的测定 重量法 Standard Type GBT ICS 77.100 CCS H11 Status 现行 Issue Date 2019-06-04 Implementation 2020-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A