供配电线路中，下列的（    ）需要采用接地保护。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69490' and id < 4501398 and id<>'4501398' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69490' and id > 4501398 and id<>'4501398' order by id asc limit 5