对于反映故障时参数减小而动作的继电保护，计算灵敏系数时应用（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69393' and id < 4492000 and id<>'4492000' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69393' and id > 4492000 and id<>'4492000' order by id asc limit 5