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A gas mask is a protective device worn over the face to protect the wearer from inhaling harmful gases or fumes. It is also known as a respirator and is used in various industries such as firefighting, chemical manufacturing, and military operations.

The main purpose of a gas mask is to filter out harmful particles and vapors from the air, allowing the wearer to breathe safely. It has a filtration system that works by using activated carbon or other materials to absorb or screen out hazardous gases and particles such as dust, smoke, and chemical agent vapors.

The gas mask typically covers the entire face and includes a nose cup, eye lenses, and a strap to secure it in place. It may also have a filter cartridge that can be replaced as needed, depending on the level of exposure and filtration requirements.

Gas masks are commonly used by firefighters to protect themselves from toxic smoke and fumes that occur during firefighting. They are also used by military personnel during chemical warfare, where exposure to nerve agents, mustard gas, and other chemical weapons can cause severe injury or death.

Gas masks are available in different types, such as full-face masks, half-masks, and powered air-purifying respirators (PAPRs). The choice of the mask will depend on the specific application and exposure level.

gas masks are an essential tool for workers in high-risk environments, providing a crucial layer of protection against respiratory hazards. Proper maintenance and training are required to ensure the equipment functions correctly and effectively, as well as to ensure that the user knows how to use and wear it properly.