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  1. 氣體流量計 相關

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  1. www.webmd.com › first-aid › nosebleeds-causes-and-treatmentsHow To Stop & Prevent Nosebleeds

    2021年10月19日 · Pinch your nostrils closed. Use your thumb and index finger to hold your nostrils closed for 5 to 10 minutes while you breathe through your mouth. This puts pressure on the part of your nose that ...

  2. 2024年2月26日 · Learn about postnasal drip, a common condition that causes sore throat, sinus drainage, and runny nose. Find out the causes, symptoms, and treatments from WebMD.

  3. 2023年5月15日 · Non-rebreather masks are designed to deliver a lot of extra oxygen to your airway. The normal fraction of inspired oxygen (FIO2), or concentration of oxygen in the air, in any room is about 21% ...

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