对于中性点可能接地或不接地的变压器，应装设（  ）接地保护。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69479' and id < 4501045 and id<>'4501045' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69479' and id > 4501045 and id<>'4501045' order by id asc limit 5