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Peak flow meter use - series


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Peak flow meter use - part four
Peak flow meter use - part onePeak flow meter use - part twoPeak flow meter use - part threePeak flow meter use - part fourPeak flow meter use - part fivePeak flow meter use - part sixPeak flow meter use - part seven
Peak flow meter use - part four
Place the mouthpiece in your mouth, between your teeth. Close your lips around it. Do not put your tongue inside the hole or block the vents in the back.


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