Home / Standards / GB/T 21221-2022 GB/T 21221-2022 Active Insulating liquids—Specifications for unused liquids based on synthetic aromatic hydrocarbons 绝缘液体 以合成芳烃为基的未使用过的绝缘液体 Standard Type GBT ICS 29.040.99 CCS K15 Status 现行 Issue Date 2022-07-11 Implementation 2023-02-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A