Home / Standards / GB/T 16399 GB/T 16399 Active Chemical analysis methods of clay—1996 粘土化学分析方法 一1996 Standard Type GBT ICS 91.100.20 CCS Q32 Status 现行 Issue Date 2023-11-02 Implementation 2022-05-01 Responsible Dept N/A Drafting Unit N/A