Home / Standards / GB/T 4984-2023 GB/T 4984-2023 Active Chemical analysis of refractories containning zirconia 含锆耐火材料化学分析方法 Standard Type GBT ICS 81.080 CCS Q40 Status 现行 Issue Date 2023-12-28 Implementation 2024-07-01 Responsible Dept 国家标准委 Drafting Unit N/A