Home / Standards / GB/T 24487-2009 GB/T 24487-2009 Abolished Alumina 氧化铝 Standard Type GBT ICS 77.120.10 CCS H61 Status 废止 Issue Date 2009-10-30 Implementation 2010-06-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A