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 concentrator is a medical instrument that provides oxygen therapy to patients with respiratory illnesses. Oxygen concentrators administer oxygen that is purer than the oxygen in the ambient air. Oxygen concentrators have become significantly more popular than compressed oxygen tanks. Unlike oxygen tanks, oxygen concentrators do not run the risk of leaking and causing explosions or fires.