我国智能变电站主要采用（ ）网络架构。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29475' and id < 2398404 and id<>'2398404' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29475' and id > 2398404 and id<>'2398404' order by id asc limit 5