An Australian Army's gas apparatus, also known as an Austox Field Service Unit, that has been sectioned for teaching purposes and sits on a square base. The two camera-facing "legs" of the apparatus have had their tops sectioned off; the two legs facing away from the camera have not been sectioned. The central grey metal pole has two attachment points and dials for oxygen (O2) and nitrous oxide (N2O).field medicine, field anaesthesia, anaesthesia, oxgen, nitrous oxide, military medicine, australian army