国家卫健委发布的标准,把相关联接汇集在这里
http://www.nhc.gov.cn/jkj/s3578/ ... bb1a6b30032ba.shtml
http://www.nhc.gov.cn/jkj/s7916/ ... 14c4f1db135a2.shtml
http://www.nhc.gov.cn/jkj/s3578/ ... c270f8f16962d.shtml
口罩类型及推荐使用人群
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