NASA NTRS · 19720000278
Balanced-bellows spirometer
Abstract
Compact balanced-bellows dry type spirometer was designed to be insensitive to acceleration fields along any or all coordinate axes. It provides true indication of respiratory action of test subject without need for calibration in acceleration fields.
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Holden, G. G., Smith, J. R., Jr.. 1972-09-01. Balanced-bellows spirometer. https://ntrs.nasa.gov/citations/19720000278
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