Function: noun
Date: 1915
: a mask connected to a chemical air filter and used to protect the face and lungs from toxic gases broadly : RESPIRATOR 1
Function: noun
Date: 1915
: a mask connected to a chemical air filter and used to protect the face and lungs from toxic gases broadly : RESPIRATOR 1
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012