Home / Standards / GB/T 13247-2019 GB/T 13247-2019 Active Methods for sampling and testing the grain size of ferroalloys products 铁合金产品粒度的取样和检测方法 Standard Type GBT ICS 77.100 CCS H42 Status 现行 Issue Date 2019-10-18 Implementation 2020-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A