Home / Standards / GB/T 5239-2015 GB/T 5239-2015 Active Praseodymium oxide 氧化镨 Standard Type GBT ICS 77.120.99 CCS H65 Status 现行 Issue Date 2015-09-11 Implementation 2016-04-01 Responsible Dept 国家标准委 Drafting Unit N/A