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Based on this comparison, it is reasonable to consider KN95(China GB2626 2006), KF94 (Korea KMOEL 2017 64) as equivalent to N95 (United States NIOSH 42CFR84) and FFP2 (Europe EN 149 2001) respirators, for filtering non oil based particles such as those resulting from wildfires, PM 2.5 air pollution, volcanic eruptions, or bioaerosols (e.g. viruses).
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Recently, PM2.5 (particulate matter with diameter of 2.5 micron or less) has become a major health hazard from the polluted air in many cities in China. The regular gauze masks are used to prevent inhaling the PM2.5 fine particles; however, those masks are not able to filter out the PM2.5 because of the large porosity of the mask materials.
kN95 Mask Adult Vertical Nonwoven Air Valved Anti Dust Mask PM 2.5 95% Respirator Mouth Face Mask With Valve Gauze filter Mask Please be kindly notedthe listed product is produced and distributed abroad and subject to the laws of its country of origin.
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FeaturesNew generation breathing filter valves. Double layer stereoscopic filter layer. Extra wide ear straps for more comfortable wearing. Breathable Pollution Reusable Anti Air Dust PM2.5 Mask Adjustable Straps Washable Respirator
Precision etching machine VJ650 Precision etching machine (two chamber) 1.Power 13.5KW/380V 2.Etching Area 650*2000mm 3.Work Width 650mm 4.Working length not limited 5.Working Temp 38~65 centigrade 6.Cutting thickness 0.1~1.5mm SST, 0.1 2mm Cu 7.Etching tolerance +/ 0.01mm 8.Etching type Chemical solution Spraying 9.Transfer type Level wheel 10.Weight 870kg 11.Outsize