Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities; section 9: Microclimates inside products (IEC 60721-3-9:1993); German version EN 60721-3-9:1993
环境条件分类.第3部分:环境参数组及其严重程度的分类;第9节:产品内部的小气候(IEC 60721-3-9-1993);德文版EN 60721-3-9:1993