Home / Standards / GB/T 39152-2020 GB/T 39152-2020 Active Test method of the bending stress relaxation for copper and copper alloy 铜及铜合金弯曲应力松弛试验方法 Standard Type GBT ICS 77.040.10 CCS H22 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