downstroke
🇬🇧/ˈdaʊnˌstrəʊk/ 🇺🇸/ˈdaʊnˌstroʊk/ 19a downward stroke, as of a machine part, piston, or the like.
noun [抽象名词]下行程；下行冲程；向下的一笔
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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