a1s2d3f4 发表于 2015-3-24 16:24:32

ASTM F2299-03 Standard Test Method for Determining the Initial Efficiency of Mat

ASTM F2299-03  Standard Test Method for Determining the Initial Efficiency of Materials Used in Medical Face Masks to Penetration by Particulates Using Latex Spheres






admin 发表于 2015-3-25 08:34:58

谢谢您的分享,金币已奖励!
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