[KongchangAI]
Unverified73% confidenceDecision RuleTime unknown

背负系统仍需重视:即便是拉杆两用款,背负时应有S型减压肩带和护脊背板,否则临时背负(如上楼梯)时全部重量压肩,脊柱负担大于普通书包

1
Sources
73%
Confidence
Long-term
Relevance
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