| 摘要 |
A respiratory protective device in which a face piece (11) is located within the volume of a filter canister (10). The filter canister (10) can be in the form of a hollow section or sections which fit around all or part of the face piece (11) or on either side thereof. Contaminated air that has been purified in the filter canister (10) is ducted in an airtight manner through a hollow assembly (18) into the face piece (11).
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