Top number indicates valve number, bottom number indicates valve size.

顶部的数字表示阀门编号，底部的数字表示阀门大小。

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Very little room was available to get to valve number 1 for emergency operation.

当遇到紧急情况时，就感到没有足够的空间可以接近1号阀门（参见左图）。

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As a replacement of valve number 1 with Red valve's Type a and pneumatic fail-safe system 700, valve number 3 has accomplished an improvement in the fluid dynamics of the system.

作为1号阀的替代品，美国红阀公司A型夹管阀和无故障气动系统700，也就是左图中的3号阀，极大地改善了流体介质的流动性。

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Edwards Lifesciences Corp. a leader in advanced cardiovascular disease treatments, is the number-one heart valve company in the world and the global leader in acute hemodynamic monitoring.

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After a number of measures to preserve his pulmonary valve, doctors replaced it last week with a porcine valve that should last 10 to 15 years, according to the website of the Children's Hospital Los Angeles.

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