工频高压试验变压器的特点是额定输出（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32665' and id < 2597929 and id<>'2597929' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32665' and id > 2597929 and id<>'2597929' order by id asc limit 5