Home / Standards / GB/T 33220-2016 GB/T 33220-2016 Active Copper-beryllium alloy forgings and extrusions—General specification 铜铍合金锻件和挤压件 通用技术条件 Standard Type GBT ICS 77.150.30 CCS J32 Status 现行 Issue Date 2016-12-13 Implementation 2017-07-01 Responsible Dept 国家标准委 Drafting Unit N/A