谢谢这么详细的解释。

来源: sitka 于 2013-04-24 17:28:38 [档案] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

回答: N95 filter out as small as PM0.3 particle, which is smaller than 由御用文人于 2013-04-24 15:06:53

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