Unverified50% confidenceDecision RuleTime unknown

20寸登机箱自重≤2.8kg可视为轻量化优秀，PC材质做到2.5kg以下已属高水准；铝框箱同尺寸通常3.8-4.5kg，无法归入轻量化范畴

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轻量化旅行箱category

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