Home / Standards / GB/T 7321-2017 GB/T 7321-2017 Active Sample preparation for testing of shaped refractory products 定形耐火制品试样制备方法 Standard Type GBT ICS 81.080 CCS Q40 Status 现行 Issue Date 2017-09-07 Implementation 2018-08-01 Responsible Dept 国家标准委 Drafting Unit N/A