GB/T 21221-2022绝缘液体以合成芳烃为基的未使用过的绝缘液体国家标准
英文:Insulating liquids—Specifications for unused liquids based on synthetic aromatic hydrocarbons GB/T 21221-2022介绍: 国家标准...
英文:Insulating liquids—Specifications for unused liquids based on synthetic aromatic hydrocarbons GB/T 21221-2022介绍: 国家标准...