| 摘要 |
A respiratory protective device comprises facepiece 11 which is located within the volume of filter canister 10. Filter canister 10 can be in the form of a hollow section or sections which fit around all or part of facepiece 11. Contaminated air that has been purified in Filter Canister 10 is ducted in an airtight manner through assembly 16,17 into Facepiece 11. |
