Home / Standards / GB/T 37502-2019 GB/T 37502-2019 Active Copper nickel alloy rods for vacuum electron devices structure material 电真空器件结构材料用铜镍合金棒 Standard Type GBT ICS 77.150.30 CCS H62 Status 现行 Issue Date 2019-06-04 Implementation 2020-05-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A