对于35kv电压等级的母线，对保护的速动性要求较高时，需要安装独立的母线保护(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69493' and id < 4501624 and id<>'4501624' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69493' and id > 4501624 and id<>'4501624' order by id asc limit 5