# a. ?5 K* e+ L7 q! w5 d) }多谢。 - \9 [6 M/ A1 n, i. t就我所知,N95口罩确有多种型号,但主要是由外形,过滤层的用料和不同厂家等因素决定的。, L* Z& c9 j3 U
其主要的参数是NIOSH(美国职业安全卫生研究所)的参数:过滤效能要至少达95%效能。& a! l. N. g; t: l1 F6 K) p
N为过滤非油性颗粒的。由于生物性微粒多属非油性颗粒因此需使用N级。而N95级即表示可防护非油性颗粒过滤效能为95%。外形为高周波压制的碗型。: m0 `* l. O% m" i- Y i9 u9 y
我进口罩的厂家有美国的NIOSH和欧洲的CE认证,是非典时期生产防菌型口罩的主要厂家。每年的出口额是1200万美元以上。质量上可以放心。& r$ w' x8 b0 W B+ {7 e) c
说实话,我进这口罩的心里是很矛盾的。当然是希望能卖得出去,但又希望情况不要坏到非使用口罩不可的程度。
Sorry everyone, I did not come to this website for quite a while.( ?; v" J+ ?* l- R. `" A( j
Now I am applying the established license for importing the face mask. This is the government requirement for importing class 1 medical materials, which including face mask. This was a surprise for me. I have discussed that with several government departments for the license and finally found a clue. The whole process would take 1 to 2 months. That means my masks ( I have already paid money) have to be stored in a Chinese factory until I obtain the license. 7 t' M/ c) q4 a; oI am so sorry for this unexpected process. If anyone needs the face mask in the following one month, please try to buy them in a drugstore or other places. # y/ k0 p/ c0 d ~( R# [Best wishes