Home / Standards / GB/T 21371 GB/T 21371 Active Gypsum from industrial by-products for use in cement 用于水泥中的工业副产石膏 Standard Type GBT ICS 91.100.10 CCS Q11 Status 现行 Issue Date 2022-12-28 Implementation 2020-09-01 Responsible Dept N/A Drafting Unit N/A