回复：能对付雾霾PM2.5和拿到NIOSH合格证书的N95口罩有:

来源: tmp32990 于 2014-01-21 17:55:08 [] [旧帖] [给我悄悄话] 阅读数 : (62 bytes)

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

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