Home / Standards / GB/T 18931-2022 GB/T 18931-2022 Active Classification of basic dense shaped refractory products containing less than 7% residual carbon 碳含量小于7%的碱性致密定形耐火制品分类 Standard Type GBT ICS 81.080 CCS Q40 Status 现行 Issue Date 2022-10-12 Implementation 2022-10-12 Responsible Dept 国家标准委 Drafting Unit N/A