现行规则:

Badminton - - RULES -

9.1.6发球员的球拍击中球的瞬间, 整个球应低于发球员的腰部。腰指的 是发球员最低肋骨下缘的水平切线; 9.1.6.1轮椅式比赛,发球员的球拍击

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