obstruction of naso-lacrimal duct
鼻泪管阻塞
obstruction beacon
(航空用)障碍物立标
bar throw-off gear
(从辊道拨往冷床)轧件拔出装置
Ampulla of Vater obstruction syndrome
Vater壶腹梗阻综合征
carcinomatous obstruction
癌性神经病
obstruction period of navigation
碍航时间
bar bending pliers
111号技工钳
bar a debt by a statute of limitations
按有关时效的法规而被免除债务
obstruction clearance
碍航物距离
bar for the cassette frame movement and adjustment
暗盒框活动和调节用棒
obstruction of oddis sphincter
奥狄氏括约肌阻塞