Unverified80% confidenceTradeoffTime unknown
PVC钢丝芯绳体较普通棉绳更耐磨、转速更快,但打到身体会比棉绳更疼,低龄初学儿童容易因甩绳打痛而产生畏惧
1
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80%
Confidence
Long-term
Relevance
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