单相两孔插座安装时，面对插座的（）接相线。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27219' and id < 2260290 and id<>'2260290' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27219' and id > 2260290 and id<>'2260290' order by id asc limit 5