Home / Standards / GB/T 20567-2020 GB/T 20567-2020 Active Vanadium-nitrogen 钒氮合金 Standard Type GBT ICS 77.100 CCS H42 Status 现行 Issue Date 2020-04-28 Implementation 2020-08-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A