Unverified85% confidenceCautionTime unknown
长时间背负（超过2小时）不要选纯薄尼龙无衬垫肩带的折叠包，细带会勒肩，应选择肩带宽度≥3cm且有轻量泡棉的款式，否则10kg以上负重会明显不适
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