IEC 60721-3-4 : 2019现行
Classification of environmental conditions – Part 3-4: Classification of groups of environmental parameters and their severities – Stationary use at non-weatherprotected locations
出版：International Electrotechnical Committee
专家解读视频
This part of IEC 60721 classifies groups of environmental parameters and their severities to which products are subjected when installed for stationary use at non-weatherprotected locations.
I.S. EN IEC 60721-3-4:2019 - Identical
PN-EN IEC 60721-3-4:2019-10 - Identical
NEN-EN-IEC 60721-3-4:2019 en - Identical
EN IEC 60721-3-4:2019 - Identical
DS/EN IEC 60721-3-4:2019 - Identical
DS/EN IEC 60721-3-4:2019 - Identical
I.S. EN IEC 60721-3-4:2019 - Identical
NEN-EN-IEC 60721-3-4:2019 en - Identical
UNE-EN IEC 60721-3-4:2019 - Identical
PN-EN IEC 60721-3-4:2019-10 - Identical
BS EN IEC 60721-3-4:2019 - Identical
EN IEC 60721-3-4:2019 - Identical
