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IEC 61643-21 Amd.2 Ed. 1.0 b:2012
M00000687
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IEC 61643-21 Amd.2 Ed. 1.0 b:2012 Amendment 2 - Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods
Amendment by International Electrotechnical Commission, 07/27/2012
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