Home / Standards / GB/T 39421-2020 GB/T 39421-2020 Active Methods for determining the static gel strength of cement formulations 水泥浆静胶凝强度测定方法 Standard Type GBT ICS 75.020 CCS E13 Status 现行 Issue Date 2020-11-19 Implementation 2021-06-01 Responsible Dept 国家标准委 Drafting Unit N/A