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.
air compressor - a compressor that takes in air at atmospheric pressure and delivers it at a higher pressure. piston chamber, cylinder - a chamber within which piston moves. mechanical device - mechanism consisting of a device that works on mechanical principles. supercharger - compressor that forces increased oxygen into the cylinders of an internal-combustion engine.