[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

头盔重量对儿童颈椎负担明显:3岁以下建议整盔重量≤250g,3-6岁≤350g,过重会导致孩子低头、抗拒佩戴,长时间可能影响颈部姿势

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