Home / Standards / GB/T 20629.4-2021 GB/T 20629.4-2021 Active Non-cellulosic papers for electrical purposes—Part 4:Aramid fibre paper containing mica particles 电气用非纤维素纸 第4部分:含云母颗粒的聚芳酰胺纤维纸 Standard Type GBT ICS 29.035.99 CCS K15 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A