Valves with this option have a hand wheel mounted on top of the actuator for manual valve operation.

配置这种备选件的阀门在执行器顶部安装一个手轮用于手动阀门操作。

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Fitting valve position feedback on manual valves now also becomes a more attractive option with the size and cost of the open solution.

现在由于开放式解决方案的尺寸和成本的优势，在手动阀上装配位置反馈也变得更有吸引力。

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This flux valve is available with an indexed variant option.

包含一个可编入的变量选项。

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In the future, however, transcatheter aortic valve implantation may be an option for treatment of aortic regurgitation.

CNN: Aortic valve regurgitation

Until recently the only option for patients whose aortic valve was stiff enough to cause them health problems was to undergo surgery to replace the valve.

FORBES: Breakthrough Heart Valves: How Will Patients Decide?