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IEC 61000-4-28：2009修改2版发行IEC 61000-4-28 (April 2009) Ed.1.2 Electromagnetic compatibility (EMC) - Part 4-28: Testing and measurement techniques - Variation of power frequency, immunity test for equipment with input current n ....
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IEC 61000-4-27：2009修改1版发行Electromagnetic compatibility (EMC) - Part 4-27: Testing and measurement techniques - Unbalance, immunity test for equipment with input current not exceeding 16 A per phaseIEC 61000-4-27:2000+A1:2009 ....
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