Home / Standards / GB/T 31968-2015 GB/T 31968-2015 Abolished Rare earth composite yttrium zirconium oxide ceramic powder 稀土复合钇锆陶瓷粉 Standard Type GBT ICS 77.120.99 CCS H65 Status 废止 Issue Date 2015-09-11 Implementation 2016-08-01 Responsible Dept 国家标准委 Drafting Unit N/A