Unverified80% confidenceTradeoffTime unknown
防护等级越高(F级)过滤效率越好但透气性越差,儿童易憋闷抗拒佩戴;日常D级卫生型透气佩戴时间可更长,实际防护效果反而因佩戴依从性更高
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80%
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Long-term
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