[KongchangAI]
Unverified70% confidenceCautionTime unknown

护脊减负的核心是正确背负与承重分配,若孩子习惯单肩背或书包长期超重,护脊设计效果会大打折扣,此类使用习惯下不建议只依赖书包本身

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70%
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Long-term
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