Stroke control mechanism for the regulation and precise control of valve opening and closing position.

行程控制机构，用以调节和准确控制阀门的启闭位置。

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Four-stroke engines of this type with this same type of intake valve motion but with a supercharger to make up for the loss of power density are known as Miller cycle engines.

四冲程发动机本与此同进气阀运动类型的类型，但以使增压器的功率损耗密度，这些都是为米勒循环发动机众所周知的。

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The face seals provide constant guiding throughout the valve stroke, maintaining continuous contact with the gate.

在阀门闸板运动的全过程中，密封面都对闸板提供恒定的引导，保持与闸板连续稳定的接触。

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Known for its four-stroke 90-degree V-twin engines and its unique valve design, Ducati has carved out an impressive racing record, highlighted by its 2007 Grand Prix World Championship win.

WSJ: At the Heart of Ducati

The broad enthusiasm for TAVI (transcatheter aortic valve implantation) as it enters the marketplace has been partially offset by concerns about an increased risk of stroke associated with the procedure.

FORBES: Study Examines New-Onset Atrial Fibrillation After TAVI