Oxygen mask

（重定向自Emergency oxygen）

A T-37 pilot wearing a mask designed for both diluter- and pressure-demand breathing

Inner view of a military aviators mask showing face seal, facepiece and inhalation valves

An oxygen mask provides a method to transfer breathing oxygen gas from a storage tank to the lungs. Oxygen masks may cover the nose and mouth (oral nasal mask) or the entire face (full-face mask). They may be made of plastic, silicone, or rubber.

In certain circumstances, oxygen may be delivered via a nasal cannula instead of a mask.

单词	Emergency oxygen
释义	Emergency oxygen 原声例句华尔街日报 The vessel is designed to sustain 96 hours of emergency oxygen. 这艘船的设计可以维持 96 小时的紧急氧气。英语百科 Oxygen mask （重定向自Emergency oxygen） An oxygen mask provides a method to transfer breathing oxygen gas from a storage tank to the lungs. Oxygen masks may cover the nose and mouth (oral nasal mask) or the entire face (full-face mask). They may be made of plastic, silicone, or rubber. In certain circumstances, oxygen may be delivered via a nasal cannula instead of a mask.
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