球轉速判斷 - 網球 Tennis

By Quintina
at 2015-10-25T23:12
at 2015-10-25T23:12
Table of Contents
想請教版上各位大大
近年在看直播經常看到螢幕跑數據統計裡
開始出現一項“球的轉速”(原文我忘了
很好奇這個轉速是怎麼被測得的?
有請各位大大解惑,謝謝!
順便恭喜Lu拿下寧波挑戰賽男單冠軍!!
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