Multiple functions performed by a single valve can result in added system protection and lower cost to the user.

多种性能集成在一个阀门上使得系统得到更多的保护，也降低了用户的成本。

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The math model of a single valve system is established on the basis of Newton's second law of motion and pressure dynamics.

本文在牛顿第二定律和压力动力学基础上建立了单气门系统的数学模型。

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If flow requirements fall outside the capacity of a single valve, an additional smaller valve installed in parallel may be required.

如果流量要求超出单个阀门的空穴区外，则可能需要并联安装一个较小的附属阀门。

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The old father was putting the radio into action a single-valve wireless he had won about a month before.

NEWYORKER: Among Animals and Plants

Within hours, SpaceX officials identified the culprit as a single defective valve, and were able to replace the part because it was easily accessible.

WSJ: SpaceX Acts Fast for New Launch

It's an overhead valve engine with a single camshaft that uses push rods to open and close the 16 valves.

FORBES: The Engine That Could