One workhorse of the ETA mechanical line is the ETA 2824-2, The 2824 is an automatic winding, twenty-five jewel movement, available in four executions or grades: Standard, Elaborated (improved), Top and Chronometer.
The Breather Valve is a protection device mounted on a nozzle opening on the top of a fixed roof atmospheric storage tank. Its primary purpose is to protect the tank against rupturing or imploding.
An oxygen conserver is a device that delivers oxygen only when you inhale rather than providing a continuous flow. This helps decrease the amount of O2 used and the amount of oxygen tanks needed. This also means that your oxygen tank lasts longer, which allows you more freedom to go out and about.