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中空纤维膜滤芯严禁冻结，0度以下冰晶会撑裂纤维导致过滤失效且无法察觉，冬季徒步应贴身携带保温或改用陶瓷/化学净水（碘片、二氧化氯）

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Unverified冬季使用需注意：滤芯内残留水分在零度以下冻结会导致中空纤维膜损坏，冻后滤芯须视为报废，寒冷环境使用后必须彻底甩干并贴身保温携带87% similar Unverified冬季或接近零度环境下，滤芯内残留水结冰会永久损坏中空纤维膜且无法从外观判断是否已损坏，低温环境需严格防冻（如夜间贴身存放滤芯）86% similar

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