[KongchangAI]
Unverified85% confidenceTradeoffTime unknown

容量与背负舒适的权衡:30L容量在随身登机包中算大,但为控制重量和尺寸,背负支撑和腰带缓冲相对简化,装满后长时间背负肩部压力明显

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85%
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Long-term
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