[KongchangAI]
Unverified80% confidenceTradeoffTime unknown

头盔重量与安全防护通常成反比,儿童颈椎较弱,骑行头盔重量宜控制在250g以内,超过300g长时间佩戴会导致孩子低头疲劳、抗拒佩戴

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