Home / Standards / GB/T 23591-2009 GB/T 23591-2009 Active Lanthanum-cerium-terbium oxide 镧铈铽氧化物 Standard Type GBT ICS 77.120.99 CCS H65 Status 现行 Issue Date 2009-04-23 Implementation 2010-02-01 Responsible Dept 国家标准委 Drafting Unit N/A