| 摘要 |
Apparatuses for personal air filtering. In one aspect, a personal air filtering system includes nasal plugs to be inserted into the nostrils and a main body worn between the nose and mouth. In another aspect, the personal air filtering system has a housing that prevents exhaled air from entering the air filter disposed in the housing. In a further aspect, the personal air filtering system has separate vents for inhalation and exhalation. |
