Home / Standards / GB/T 39137-2020 GB/T 39137-2020 Active Determination for the orientation of refractory metal single crystal 难熔金属单晶晶向测定方法 Standard Type GBT ICS 77.040.20 CCS H26 Status 现行 Issue Date 2020-10-11 Implementation 2021-09-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A