obstruction class的相關資料：
臨近單詞
obstructions
obstruction
obstruction of naso-lacrimal duct
Obstruction of Pericardium by Phlegm
obstruction and stress with friction
Obstruction of intestine by gallstone
obstruction of vesicourethral orifice
Obstruction of ureteropelvic junction
obstruction at ureteropelvic junction
Obstruction of pelviureteric junction
obstruction sleep apnea-hypopnea syndrome
