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IEC 61643-21 Ed. 1.0 b CORR1:2001
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IEC 61643-21 Ed. 1.0 b CORR1:2001 Corrigendum 1 - Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods
en, Corrigenda by International Electrotechnical Commission, 03/28/2001