Home / Standards / GB/T 38887-2020 GB/T 38887-2020 Active Spherical graphite 球形石墨 Standard Type GBT ICS 29.050 CCS Q53 Status 现行 Issue Date 2020-06-02 Implementation 2021-01-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A