Postal sorting line: Listen & Download Postal sorting line .mp3 Error! Change your browser, please! ⇓ Download Machine engine gaining momentum ⚠ Crusher ⚠ Compressor, shutdown, start, run ⚠ Newspaper press ⚠ Electric generator (hum) ⚠ Automatic folder ⚠ General noise, loaders, Work in a warehouse ⚠ Lathe turning on, work, stop ⚠ Gas welding ⚠ Forklift approaching ⚠ Breakdown press ⚠ Fluid drilling, Brewing unit ⚠ ★★★★★