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Revised
IEC 60721-3-2:1997 ED2
Current
IEC 60721-3-2:2018 ED3
IEC 60721-3-2:2018/COR1:2018 ED3
IEC 60721-3-2:2018/COR2:2022 ED3
IEC 60721-3-2:2018/COR3:2024 ED3