Internal exhaust valve increases down stroke speed.

内部排气阀增加下冲速度。

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Both the down stroke and the up stroke are highlighted in different colors.

无论是向上和向下中风中风是突出了不同的颜色。

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Deformation of helical buckling appeared on rod during down stroke is also analyzed.

同时分析了下冲程抽油杆所产生的螺旋弯曲变形。

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He starts scraping under my sideburns, holding the skin taut, and then shaves down in one stroke, exerting no pressure on the razor.

WSJ: Razor Sharp | The Return of the Classic Wet Shave

Dr. Snyder believes D-serine is there as a fail-safe to make sure memory cells spring into action only when they are supposed to--a process that breaks down during a stroke.

FORBES: Repairing The Brain

Snyder believes that D-serine is there as a fail-safe to make sure that memory cells spring into action only when they are supposed to--a process that breaks down during a stroke.

FORBES: Repairing The Brain