Electrical engineering; classification of environmental conditions; environmental conditions appearing in nature; temperature and humidity; identical with IEC 60721-2-1, edition 1982
Electrical engineering; classification of environmental conditions; environmental conditions appearing in nature; temperature and humidity; identical with IEC 60721-2-1:1982 (status of 1987)— 27 стр.
Electrical engineering; classification of environmental conditions; environmental conditions appearing in nature, solar radiation and temperature; identical with IEC 60721-2-4:1987 (status as of 1988)— 12 стр.
