| 摘要 |
Breathing apparatuses for protecting users from inhaling contaminated air through their mouth and nose. One of the exemplary breathing apparatuses utilizes a filtering unit, whereas another exemplary breathing apparatus utilizes a air source in conjunction with a filtering unit. A nose plug prevents the contaminated air from entering the users' nose and a transparent bag prevents the contaminated air from entering the eyes, ears and noses of the users. |
