DIN IEC 60721-3-4 : 1989被替代
ELECTRICAL ENGINEERING; CLASSIFICATION OF ENVIRONMENTAL CONDITIONS; CLASSIFICATION OF GROUPS OF ENVIRONMENTAL PARAMETERS AND THEIR SEVERITIES; STATIONARY USE AT NON-WEATHERPROTECTED LOCATIONS
出版：German Institute for Standardisation (Deutsches Institut für Normung)
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基本信息
標準編號： DIN IEC 60721-3-4 : 1989
標準類別：Standard
出版單位：German Institute for Standardisation (Deutsches Institut für Normung)
標準頁數：0
標準簡介
Classifies groups of environmental parameters and their severities to which a product may be exposed under its use conditions, including periods of erection work, downtime, maintenance and repair, when mounted for stationary use at locations which are non-weatherprotected.
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