Home / Standards / GB/T 6896-2007 GB/T 6896-2007 Active Niobium bars 铌条 Standard Type GBT ICS 77.150.99 CCS H63 Status 现行 Issue Date 2007-11-23 Implementation 2008-06-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A