Home / Standards / GB/T 20078 GB/T 20078 Active Copper and copper alloys—Forgings 铜和铜合金 锻件 Standard Type GBT ICS 77.120.30 CCS J32 Status 现行 Issue Date 2023-05-23 Implementation 2023-12-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委