Spectrograph: Listen & Download Spectrograph .mp3 Error! Change your browser, please! ⇓ Download Breakdown press ⚠ Oil pump ⚠ Signal for lunch at the factory ⚠ Air compressor, air blow ⚠ The atmosphere of the factory, rattling ⚠ Hydraulic down machine ⚠ Robotic assembly line ⚠ Lowers forks, Forklift raises ⚠ Bottling plant ⚠ Power Plant Water Pumps ⚠ Low frequency running engine ⚠ Electric industrial motor ⚠ ★★★★★