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FACE MASK HAVING CLOSABLE OPENING AND METHOD OF REDUCING EXPOSURE TO RESPIRATORY ILLNESS
FACE MASK HAVING CLOSABLE OPENING AND METHOD OF REDUCING EXPOSURE TO RESPIRATORY ILLNESS
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机译：具有可关闭的开口的面膜和减少呼吸道疾病的暴露的方法
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摘要
A face mask having an opening covered by a flap is disclosed. Also disclosed is a method of reducing exposure to a respiratory illness while eating or drinking.
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