Open needle valve "b" and vent or bypass needle valve, bleeding to atmosphere, then closing needle valve "b" restores the system to a normal static condition.

开启针形阀“B”和排气或旁路针形阀，排放到大气中，然后关闭针形阀“B”，将系统恢复到正常的静止状态。

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Mr Sands thinks his problem stems from an acid reflux condition caused by a damaged valve in his stomach.

Sands先生认为他的这个毛病最初源于胃部的幽门受损而导致的胃酸回流。

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Check the working condition regularly. Replace the sealing ring after the valve is used for a long time.

定期检查运行情况，对长期使用后的伸缩器应及时更换密封圈。

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The blockbuster cholesterol drug Vytorin failed to improve a rare heart valve condition called aortic stenosis and seemed to increase rates of cancer, a new study says, dealing another blow to the top-selling drug and its makers, Merck and Schering-Plough .

FORBES: Another Blow For Merck And Schering

For certain heart conditions, antibiotics are recommended about one hour before invasive medical procedures to prevent a condition called infective endocarditis, which is a potentially life-threatening bacterial infection of the inner lining or valve within the heart.

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