- Mike is the owner of the gas mask manufacturing company.
Jim has a set of simulation toys for gas masks.
Firefighters wear gas masks when entering the fire.
The filter of the gas mask has a shelf life.
The police used tear gas, and protesters without gas masks had to evacuate.
Gas masks are available on some auction sites.
The gas mask must cover the mouth and nose completely before it can effectively use its function.
The gas mask is composed of a respirator and a filter.
Gas masks protect the wearer from inhalation of pollutants and toxic gases in the air.
At present, the structure of military gas masks is the most complicated.