Home / Standards / GB/T 20567-2006 GB/T 20567-2006 Abolished Vanadium-nitrogen 钒氮合金 Standard Type GBT ICS 77.100 CCS H42 Status 废止 Issue Date 2006-11-01 Implementation 2007-02-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会