Unverified88% confidenceDecision RuleTime unknown
面罩尺寸按年龄分号：新生儿0号、婴儿1号、幼儿2号、儿童3号、成人4号、大脸成人5号；面罩必须完整覆盖鼻梁到下颏凹陷处，密封不严会导致有效潮气量大幅流失
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88%
Confidence
Long-term
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