1.认证不同 95型口罩是美国国家职业安全卫生研究所认证的9种颗粒物防护口罩中的一种。3M在中国销售的防颗粒物口罩产品源自不同产地，除获得原产地所需认证外，均获得中国劳安（LA）认证。2.效果不同 95表示暴露在规定数量的专用试验粒子下，口罩内的粒子浓度要比口罩外粒子浓度低95%以上。3M防颗粒...
As part of 3M’s efforts to fight the COVID-19 pandemic from all angles, in early April 2020, 3M reached agreement with the U.S. government on a plan that, enabled FEMA to import more than 228 million respirators into the United States over a 6-month period starting in April 2020, ...
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Wearing a dust mask or respirator can help protect you from the flu as well as airborne viruses, including the coronavirus that causes COVID-19; however, they don’t offer 100% protection. These masks can help block the spread of respiratory droplets containing influenza, but transmission is ...