投球的相關問題((20點 - 健身
By Steve
at 2011-08-16T00:00
at 2011-08-16T00:00
Table of Contents
我現在是國二升國三大概17355公斤我都從捕手的地方走20步那可以大概說一下投出去大概幾秒到捕手手套或者是什麼方法可以看出球速大概多少?我現在7天有4天都在投球我一天大概投個50球我都投四逢線跟指叉球還有曲球跟變速球人家都說太早投變化球手以後會廢掉我現在是國中可以投手腕要轉的變化球�
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健身
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By Hedwig
at 2011-08-19T11:31
at 2011-08-19T11:31
By Carolina Franco
at 2011-08-19T15:47
at 2011-08-19T15:47
By Hedwig
at 2011-08-18T11:40
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at 2011-08-19T06:42
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at 2011-08-16T05:32
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at 2011-08-16T22:41
at 2011-08-16T22:41
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