Home / Standards / GB/T 19850-2013 GB/T 19850-2013 Active The seamless copper tubes for electrical purposes 导电用无缝铜管 Standard Type GBT ICS 77.150.30 CCS H62 Status 现行 Issue Date 2013-12-17 Implementation 2014-09-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A