Home / Standards / GB/T 9489-2024 GB/T 9489-2024 Active Methods for chemical analysis of alundum powder 刚玉粉化学分析方法 Standard Type GBT ICS 91.100.10 CCS Q62 Status 现行 Issue Date 2024-11-28 Implementation 2025-06-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A