ʻO ASTM Level 1 (Low) Rated Medical Masks Light / liʻiliʻi loa ka pale BFE & PFE i hoʻohana ʻia no nā kaʻina hana maʻamau, ʻokiʻoki liʻiliʻi liʻiliʻi, ophthalmology, a me ka etiquette hanu.BFE ma 3.0 micron ASTM F2101 ≥ 95% PFE ma 0.1 micron ASTM F2299 ≥ 95% Delta P <5.0 mm H2O/cm2 Kū'ē wai i ...
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