俺發的好時，感覺速度能上100邁。但不是太穩定。請各位網球大俠看看，給點改進的建議。謝謝
網球發球--征求advice.
影弟 (2011-05-01 20:44:09) 評論 (0)俺發的好時，感覺速度能上100邁。但不是太穩定。請各位網球大俠看看，給點改進的建議。謝謝
海外博客
網球發球--征求advice.
登錄後才可評論.
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