The minimum polished rod load occurs near the top of the stroke with the start of the downstroke.

最小光杆负荷发生在下行冲程开始时的冲程顶部附近。

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The difference in the peak load on the upstroke and the minimum load on the downstroke of a polished rod.

光杆上行冲程时的最大负载与下行冲程时的最小负载之差。

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Phase IV is the inspiratory downstroke. This is the beginning of the inhalation and the carbon dioxide curve falls steeply to zero.

阶段IV是吸气下降支。这是吸入的开始及二氧化碳曲线急速降为零。

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