下颌前牙若有双根管时，其双根管的排列方向一般是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32227' and id < 2567336 and id<>'2567336' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32227' and id > 2567336 and id<>'2567336' order by id asc limit 5