标题: 22.20怎么理解 [打印本页] 作者: tnq1 时间: 2012-1-4 20:38 标题: 22.20怎么理解 如题EN 60335-1章节22.20怎么理解
22.20 direct contact between live parts and thermal insulation shall be effectively prevented unless such material is non-corrosive, non-hygroscopic and non-combustible.