Respiratory demand during rigorous physical work in a chemical protective ensemble
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<subfield code="a">Protection afforded by a respirator fliter depends on many factors, among them chemical or biological agent or flow rate. Filtration mechanisms, such as chemical adsorption, depend on sufficient residence time for the filter media to extract noxious agents from the airstream. Consequently, filter efficiency depends on inspiratory air velocities, among other factors</subfield>
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