The air-filtration intake filter.
Gas mask was created in 1914.
I think it stopped gas getting in the mask...
A person wearing a gas mask.
A gas mask is used to filter out toxic agents in the air.
M65 Gas Mask.
The main part of the gas mask is made out of rubber.
its a mask made for ariabians
They use the military varient of the Gp7 gas mask.
It's just called a gas mask.
No they don't, Gas Mask filters are designed not to go bad despite if the lid is unscrewed off, unscrewing the lid of a gas mask filter doesn't have any effect on the gas mask or it's filters.
Edward Frank Harrison, in 1915, is generally credited with inventing the gas mask.
What was the original problem the gas mask was designed to address