Search results

...and has been manufacturing self-contained breathing apparatus for diving, firefighting and rescue applications since the 1950s. ...may be caused by the diet of the diver and the dead space of the diver and equipment, raised levels of carbon dioxide, or raised work of breathing and tolerance ...

*[[Firefighting]]: The earliest firefighters were in the city of Rome. In 60 A.D., Roman em ...ritannica.com/sports/fencing|title=fencing {{!}} History, Organizations, & Equipment|website=Encyclopedia Britannica|language=en|access-date=2019-11-26}}</ref> ...