皮球是否出界规则科普:以球体正上方的垂直投影来判定

来源:NBA直播吧

足球球出边线的规则:

皮球是否出界,是根据球体正上方的垂直投影,是否完全过线来判定是否出界,而非球的实体有没有压线。即球的整体投影完全出界,才能判定皮球是出界。

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