Spectrograph: Listen & Download Spectrograph .mp3 Error! Change your browser, please! ⇓ Download Hydraulic machine up ⚠ Bottling plant ⚠ Small centrifuge ⚠ Printing press ⚠ Run, start, shutdown, Compressor ⚠ Newspaper press ⚠ Electric industrial motor ⚠ Compressor industry ⚠ Air compressor turn on, turn off ⚠ Hydraulic activator ⚠ Factory Atmosphere ⚠ Milling machine ⚠ ★★★★★