obstructionn.障碍;妨碍;闭塞;违例阻挡
obstruction of nasolacrimal duct鼻泪管阻塞
obstruction of Oddi rs sphincter奥狄氏括约肌阻塞
obstruction sleep apnea syndrome鼾症
Obstruction of precerebral artery大脑前动脉梗阻
obstruction of male genital tract男性生殖道阻塞
obstruction of superior vena cava上腔静脉梗阻
Obstruction of lacrimal canaliculi泪小管梗阻
Obstruction of lacrimal canaliduli泪总管狭窄