[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

护脊书包的背部支撑板应采用S型人体工学设计,缓冲层EVA厚度≥8mm,能将书本重量分散到整个背部而非集中腰椎,减少小学生脊柱侧弯风险

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