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['Personal Protective Equipment']
['Respiratory Protection']
10/07/2026
(a) The closed-circuit apparatus will be classified according to the length of time it supplies adequate breathing gas to the wearer during man test No. 4 described in Table 4 of this subpart.
(b) The service time obtained on man test No. 4 will be used to classify the closed-circuit apparatus in accordance with §84.53.
['Personal Protective Equipment']
['Respiratory Protection']
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