Home / Standards / GB/T 5069-2015 GB/T 5069-2015 Abolished Chemical analysis of magnesia-alumina refractories 镁铝系耐火材料化学分析方法 Standard Type GBT ICS 81.080 CCS Q40 Status 废止 Issue Date 2015-12-10 Implementation 2017-01-01 Responsible Dept 国家标准委 Drafting Unit N/A