Unverified90% confidenceDecision RuleTime unknown
应急储备优选热量密度≥450kcal/100g的产品，单块20-30g即可提供120-140kcal，负重相同时能量密度高的更省重量
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Unverified应急储备优选热量密度≥450kcal/100g的产品，同等重量下供能更高效，可减少负重92% similarUnverified热量密度通常在450-480kcal/100g左右，与专业军用压缩口粮相当，单块体积小重量轻，适合对背负重量敏感的场景86% similarUnverified面料克重是保暖分水岭：克重≥600g/m²适合0度以下，450-550g/m²适合5-15度过渡季，低于400g/m²只能作春秋外套78% similarUnverified标称容量需区分毛重与净气重，市面常见550ml罐净制冷剂约200-300g，选购时看净重（g）比看容积（ml）更能反映实际可用气量76% similarUnverified容量越大保温越久但越重，1000ml注满水约1.1kg，敷腹部/暖被窝选800-1200ml，暖手/暖脚随身携带选350-500ml更轻便75% similar
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