| 摘要 |
A respirator assembly is described, which includes a respirator shell defining an air inlet opening, an air inlet conduit positionable within the air inlet opening, and an outer device configured to fit over the air inlet conduit and sandwich a portion of the respirator shell between the air inlet conduit and outer device. The air inlet conduit is configured to be removable from the air inlet opening when not attached to the outer device. |
