主变压器保护和站控层主要通过（   ）网络传输数据。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='55173' and id < 3483408 and id<>'3483408' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='55173' and id > 3483408 and id<>'3483408' order by id asc limit 5