500kV 电压等级，选用下列哪种形式的断路器(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69524' and id < 4504252 and id<>'4504252' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69524' and id > 4504252 and id<>'4504252' order by id asc limit 5