国内淘宝京东网上给家里老人买过,用了多年,对血压,睡眠,心脏等症状有缓解,

来源: 2021-12-19 15:20:34 [旧帖] [给我悄悄话] 本文已被阅读:

主要原理是分子筛过滤掉氮原子,提高氧气浓度。大约1-4千人民币。

 

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