DIN EN 60721-3-7:1995 环境条件分类.第3部分:环境参数组分类及其严酷程度分级.第7节:便携式和不固定使用的产品
Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Section 7: Portable and non-stationary use (IEC 60721-3-7:1995); German version EN 60721-3-7:1995