EN 60721-3-3-1995 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3节:气候防护场所使用的固定装置 替代 EN 60721-3-3-1993;包含修改件A2-1997;IEC 721-3-3:
Classification of Environmental Conditions; Part 3: Classification of Groups of Environmental Parameters and Their Severities; Section 3: Stationary Use at Weatherprotected Locations (Incorporates Amendment A2: 1997)