Unverified80% confidenceTradeoffTime unknown
球棒越软越安全,但过软的纯海绵棒击球无反馈、无法建立击球时机感;击球训练建议选带塑料内芯的中硬度泡棉棒,纯软棒仅适合1-3岁纯玩耍
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80%
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Long-term
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