外为后生皮层，木质部导管呈“V”字形，中央有髓的药材是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26301' and id < 2200223 and id<>'2200223' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26301' and id > 2200223 and id<>'2200223' order by id asc limit 5