330kV 及以上的配电装置，(    )起主要作用。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id < 4504411 and id<>'4504411' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id > 4504411 and id<>'4504411' order by id asc limit 5