Unverified85% confidenceTradeoffTime unknown
机缝球(machine-stitched)比手缝球便宜且日常训练够用,热粘合(thermal bonded)球保压和防水更好但价高;儿童日常训练机缝球即可,无需追求热粘合工艺
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85%
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Long-term
Relevance
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