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。

Sporting a powerful but eccentric downstroke, Guldahl won three major championships in as many years.

动作古怪地挥出了有力一杆后，古德赫取得了三大重要赛事的连胜，而且好几年都赢了大满贯。

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。

The lines that formed the letters started again each time on the upstroke, the downstroke, and before the curves and loops.

那些组成字母的一行行字每次开始写时都朝上挑，朝下冲的，而且还是在那些曲线和圈圈之前。

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。