无时限电流速断保护的保护范围是线路的70%。()

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69548' and id < 4507120 and id<>'4507120' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69548' and id > 4507120 and id<>'4507120' order by id asc limit 5