[影片] 無意間發現這玩意
簡易型的發球機
看影片好像只有三種球
也只有同個方向的樣子
這個買來給小孩子培養興趣用,似乎不錯喔
而且不到5000塊的話
不知划不划算
http://ppt.cc/g9pA
這個
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