Home / Standards / GB/T 3457-2013 GB/T 3457-2013 Active Tungstic oxide 氧化钨 Standard Type GBT ICS 77.150 CCS H63 Status 现行 Issue Date 2013-09-27 Implementation 2014-08-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A