medical face mask-pg电子麻将胡了下载

medical face masks type iir (surgical masks) are principally intended for use by healthcare professionals in an operating room or other medical settings with similar requirements.

surgical face mask  (en14683

surgical face mask  (en14683:2019 type iir)

bacterial filtration efficiency (bfe ) % ≥ 98%

differential pressure (pa/cm2) < 60

splash resistance pressure (kpa) ≥ 16.0