Unverified80% confidenceTradeoffTime unknown
深沟槽+密集颗粒（麻面）纹路的球防滑抓握最好，适合手小力弱的儿童；但沟槽越深越容易积灰卡沙、且颗粒磨平后防滑骤降，室外多沙地区需定期擦洗
1
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80%
Confidence
Long-term
Relevance
-
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