[本科]对于闭锁式方向纵联保护，区外故障时（  ）侧发出闭锁信号。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69478' and id < 4500872 and id<>'4500872' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69478' and id > 4500872 and id<>'4500872' order by id asc limit 5