请教大神怎么理解IEC61000-4-11中如下内容
如题，请教大神怎么理解IEC61000-4-11中如下内容？The EUT shall be tested for each selected combination of test level and duration with a sequence of three dips/interruptions with intervals of 1 0 s minimum (between each test event). Each representative mode of operation shal l be tested.
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