[情報] 棒球投手的握球方式介紹
http://blog.roodo.com/coldbaseball/archives/3678419.html
大家有興趣可以參考一下,有空可以做做練習 XD
http://blog.roodo.com/coldbaseball/archives/5718639.html
建民葛葛的新球種 XD
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