hlqmike 发表于 2015-7-13 09:02:57

ASTM F2101 - 14

ASTM F2101 - 14  Standard Test Method for Evaluating the Bacterial Filtration Efficiency (BFE) of Medical Face Mask Materials, Using a Biological Aerosol ofStaphylococcus aureus

yangwm 发表于 2015-7-13 09:02:58

http://bbs.infoeach.com/forum.php?mod=viewthread&tid=90068&extra=

hlqmike 发表于 2015-7-15 10:16:54

各位帮助一下哈。。。。。。。。。

hlqmike 发表于 2015-7-20 08:15:14

求助啊...................................
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