EN 60721-3-7-1995 环境条件分类.第3部分:环境参数组及其严酷程度的分类.第7节:便携式和不固定使用的产品;包含修改件A1-1997;IEC 721-3-7-1995+A1-1996[替代:CENELEC HD 478.
Classification of Environmental Conditions; Part 3: Classification of Groups of Environmental Parameters and Their Severities; Section 7: Portable and Non-Stationary Use (Incorporates Amendment A1: 1997)