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並前往https://www.health.com/condition/infectious-diseases/coronavirus/how-long-can-you-wear-kn95-n95-kf94-mask-before-replacing

How Long Can You Wear a KN95, N95, or KF94 Mask Before

Experts weigh in on how long you can wear a KN95, N95, or KF94 mask—also known as respirators—before you have to throw them out.

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