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Peak flow meter use - series: Peak flow meter use - part five

Peak flow meter use - series Illustrations: Peak flow meter use - part one Peak flow meter use - part two Peak flow meter use - part three Peak flow meter use - part four Peak flow meter use - part five Peak flow meter use - part six Peak flow meter use - part seven

Blow out as hard and fast as you can. You want to move the marker as far as you can with your breath, so concentrate on exhaling forcefully and quickly.