downstroke

基本解釋

The minimum polished rod load occurs near the top of the stroke with the start of the downstroke.
最小光桿負荷發(fā)生在下行沖程開始時的沖程頂部附近。
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Sporting a powerful but eccentric downstroke, Guldahl won three major championships in as many years.
動作古怪地揮出了有力一桿后，古德赫取得了三大重要賽事的連勝，而且好幾年都贏了大滿貫。
The lines that formed the letters started again each time on the upstroke, the downstroke, and before the curves and loops.
那些組成字母的一行行字每次開始寫時都朝上挑，朝下沖的，而且還是在那些曲線和圈圈之前。