Home / Standards / GB/T 13559-1992 GB/T 13559-1992 Abolished Yttrium metal 金属钇 Standard Type GBT ICS 77.120.70 CCS H65 Status 废止 Issue Date 1992-07-09 Implementation 1993-04-01 Responsible Dept 国家发展改革委 Drafting Unit N/A