Postal sorting line: Listen & Download Postal sorting line .mp3 Error! Change your browser, please! ⇓ Download Oil pump ⚠ Hydraulic down machine ⚠ Laser welding ⚠ Forklift approaching ⚠ Book press ⚠ Factory Atmosphere ⚠ Circular knitting machine ⚠ Shutdown, start, run, Compressor ⚠ Breakdown press ⚠ Factory work, general noise ⚠ Air blow, Air compressor ⚠ Electric industrial motor ⚠ ★★★★★