Home / Standards / GB/T 20511-2006 GB/T 20511-2006 Active Refractory products - Rules of model 耐火制品分型规则 Standard Type GBT ICS 81.080 CCS Q40 Status 现行 Issue Date 2006-09-30 Implementation 2007-02-01 Responsible Dept 国家标准委 Drafting Unit N/A