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Q: Is it protector from formaldehyde gas??

Asked by DrDanger on 2019-01-08 03:54:26

BG354325111 also yes

2022-02-16 04:22:19 Helpful (0)
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Q: How long can use???

Asked by Donnello on 2020-05-06 12:55:45

BG354325111 one's aday

2022-02-16 04:22:07 Helpful (1)
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Q: this filter work for corona virus ?

Asked by BG561817573 on 2020-04-15 01:28:15

BG354325111 i think yes

2022-02-16 04:21:47 Helpful (0)
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