| 摘要 |
A deep breathing training device includes a band worn around the abdomen which carries a switch. The switch is connected to a human-perceptible indicator. When the wearer of the device takes a deep breath and expands their abdomen, the expansion of the belt activates the switch and causes the indicator to activate. Conversely, if the wearer merely expands their chest without expanding the abdomen, the band is not stretched and the indicator does not activate.
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