N95 filter out as small as PM0.3 particle, which is smaller than

The definition of N95 literally means it filters 95 percent of particulate matter - as small as PM0.3 microns, much smaller than PM2.5."

N95 mask sale is increased a few time more in China.  You can get N95 mask online in China.... Your friends had no enough knowdge about this, and so he could only asked you to help it in the US .  Actually 3M already shipped a huge amount N95 mask to China.

 

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• 謝謝這麽詳細的解釋。 -sitka- ♀ (0 bytes) () 04/24/2013 postreply 17:28:38

• 其實您的國內的朋友，隻要他問問周圍的人就知道該買什麽口罩了。3M的N95是國內的最好牌子。。。 -禦用文人- ♀ (138 bytes) () 04/24/2013 postreply 17:48:15