下列哪些变压器应装设瓦斯保护？（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69380' and id < 4491676 and id<>'4491676' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69380' and id > 4491676 and id<>'4491676' order by id asc limit 5