Internal exhaust valve increases down stroke speed.

内部排气阀增加下冲速度。

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The calculations for the stroke, speed and acceleration of the plunger are summarized, providing a basis for selecting the structure and working parameters of the pump.

还综述了柱塞冲程、速度和加速度的计算，为特种抽油泵结构和工作参数的正确选择提供了依据。

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The pressure, stroke, speed, dwell time and shut height can be adjusted according to request, allowing for convenient operation;

压力、行程、速度、保压时间、闭合高度均可按需求调整，方便操作；

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During the swims, the researchers measured the volunteers' oxygen consumption, rectal temperature, swim speed and angle, and stroke rate and length.

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The device saves all the data from each hit, namely the animation, path, putter-face angle at impact and throughout the stroke, angle of attack, tempo, impact speed and swing path distance -- in other words, more information than most players would know what to do with.

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Calves swimming in echelon showed a 28% increase in average swim speed and a 19% increase in distance per stroke.

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