以下哪个不属于变压器并联运行的优点（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69321' and id < 4487853 and id<>'4487853' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69321' and id > 4487853 and id<>'4487853' order by id asc limit 5