不是所有母线都必须装设专门的母线保护。(    )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69493' and id < 4501613 and id<>'4501613' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69493' and id > 4501613 and id<>'4501613' order by id asc limit 5