那时Q 4000会控制连接阻塞管和压井管到油井的真空阀。

The Q4000 will then have control over the valves that connect the choke and kill lines to the well proper.

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在鼻整形病人中偶见因外鼻阀的原因引起鼻阻塞，特别是在那些鼻尖夹捏畸形修复的病例中。

The external nasal valve is an occasional site of obstruction in rhinoplasty patients, particularly in secondary patients with a pinched alae deformity.

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以往的研究表明，鼻阀在鼻阻塞产生中的作用比先前所认识到的要大得多，而鼻中隔可能起的作用却较小。

Previous studies have indicated that the nasal valves contribute much more to obstruction than previously realized and that the septum may play a much smaller overall role.

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