Home / Standards / GB/T 37797-2019 GB/T 37797-2019 Active Precision alloys—Designation 精密合金 牌号 Standard Type GBT ICS 77.140.99 CCS H58 Status 现行 Issue Date 2019-08-30 Implementation 2020-07-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A