Home / Standards / GB/T 8320-2025 GB/T 8320-2025 Active 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 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A