避雷器伏秒特性曲线 S₁需低于被保护设备曲线 S₂，其目的是（ ）（0.5）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69414' and id < 4494306 and id<>'4494306' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69414' and id > 4494306 and id<>'4494306' order by id asc limit 5