在工程实际应用中，绝缘油击穿的原理是(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id < 4504374 and id<>'4504374' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id > 4504374 and id<>'4504374' order by id asc limit 5