滚动速度（推杆）
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定义
- 球开始滚动时的速度（当圆周速度和球速度相等时）。
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滚动速度的应用
- 将滚动速度与球速和 Speed Drop 结合查看很有用，因为它反映了初始滑行阶段之后的球速。
- 因此，应该查看滚动速度与球速的关系，以更好地评估在滑行阶段球速的损失。
产品类别
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