Unverified70% confidenceFactTime unknown

带手提滚轮压缩棒（擀压器）的收纳袋，手动排气效率比徒手卷压高40%以上，无需电动泵即可达到接近真空的效果

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压缩收纳袋category

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Unverified手动挤压式压缩袋（无泵）压缩率约50-60%，真空抽气泵/电动泵可达70-80%，出行短期使用选手动卷压式即可，长期换季储物才需配电动泵84% similar Unverified手卷式压缩袋无需真空泵，靠单向排气阀+手压排气，适合旅行；但压缩率仅50-60%，远低于抽气泵款的70-80%84% similar Unverified手动泵活塞式（拉杆抽气）比按压式（气囊）单次抽气量大，达到同等真空度所需次数少约50%，适合大容量罐（1L以上）；小袋密封用按压式即可84% similar

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