| 摘要 |
PURPOSE: An emergency gas mask is provided to offer enough escape time, to guarantee the safety of people, and to make massive distribution thereof possible. CONSTITUTION: An emergency gas mask comprises a main body(2), a sealing unit(4), an exhausting part(6), a secondary sealing member, and a sound production unit(7). In the main body, a glass window is formed in the front thereof. In the bottom of the main body, an opening is formed. The sealing unit is formed in the bottom of the main body and is combined with the opening. The exhausting part blocks external air to easily discharge internal air. The sound production unit is able to make a sound by exhaling breath.
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