变压器的纵差动保护是变压器的（  ）保护。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69479' and id < 4501005 and id<>'4501005' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69479' and id > 4501005 and id<>'4501005' order by id asc limit 5