Home / Standards / GB/T 8320-2017 GB/T 8320-2017 Abolished Copper-tungsten and silver-tungsten electrical contacts 铜钨及银钨电触头 Standard Type GBT ICS 29.120.99 CCS K14 Status 废止 Issue Date 2017-11-01 Implementation 2018-05-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A