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.
exhaust pipe-a pipe through which burned gases travel from the exhaust manifold to the muffler. exhaust valve-a valve through which burned gases from a cylinder escape into the exhaust manifold. muffler, silencer-a tubular acoustic device inserted in the exhaust system that is designed to reduce noise.