Home / Standards / GB/T 4984-2007 GB/T 4984-2007 Abolished Chemical analysis of refractories containing zirconia 含锆耐火材料化学分析方法 Standard Type GBT ICS 81.080 CCS Q44 Status 废止 Issue Date 2007-04-18 Implementation 2007-10-01 Responsible Dept 国家标准委 Drafting Unit N/A