回複：能對付霧霾PM2.5和拿到NIOSH合格證書的N95口罩有:

來源: tmp32990 於 2014-01-21 17:55:08 [] [舊帖] [給我悄悄話] 閱讀數 : (62 bytes)

Thanks a lot. I'll take a careful look and choose one.

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