[KongchangAI]
Unverified86% confidenceDecision RuleTime unknown

背长(背板长度)需与躯干长度匹配,而非身高,躯干长度指第七颈椎到髋骨顶端连线的距离;背长不合适时,再好的减震系统也无法把负重正确传导到髋部,这是选包最容易被忽略的决定性参数

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Long-term
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