weeper drain；weep drain；drainage ditch；drain ditch
anal ring hairs anal ring setae
drain castinghollow casting drain tile
A bdomino-anal resection
Adenocarcinoma of the anal glands
Adenocareinoma of anal canal
anal
肛裂
臀脉
肛门
肛管
臀部的
尾端的
锁肛
肛门的
航道
分析
肛膜
肛门腺
肛内陷
肛门囊
肛门反射
anal atresia with perineal fistula
anal atresia with urethral fistula
anal atresia with vaginal fistula
anal atresia with vestibular fistula