By softly closing both nostrils, the clip forces all air to enter and leave through the mouth. This simple action removes guesswork and provides clean, accurate breathing data.
「読んだ」した漫画はまだありません
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By softly closing both nostrils, the clip forces all air to enter and leave through the mouth. This simple action removes guesswork and provides clean, accurate breathing data.
「読んだ」した漫画はまだありません