PN E04555-30-1988
电器及电子产品.环境条件分类.第3部分:环境参数群分类及其严重性分类[IEC出版物译文721-3-0(1984)]
Electrical and electronic products Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Introduction [Translation of IEC Publication 721-3-0, (1984)]