One requirement is that the current M50 gas mask, in use by all ... complete with computer replicated breathing through mouth, SMARTMAN wears an M50 mask within a small, industrially filtered ...

The British reaction was really quick: they’ve made some respirators from cotton mouth ... causes breathing difficulties, circa 1935. Three air raid wardens wearing a new type of gas mask ...

The SABS continuously tests gas masks and protective breathing devices manufactured and/or sold in ... covering the entire face as well as half masks covering the chin, nose and mouth are also ...

The SABS continuously tests gas masks and protective breathing devices manufactured and/or sold in ... covering the entire face as well as half masks covering the chin, nose and mouth are also ...