Electric generator (hum): Listen & Download Electric generator (hum) .mp3 Error! Change your browser, please! ⇓ Download Electric industrial motor ⚠ Printing press ⚠ Air compressor turn on, turn off ⚠ Steam pump ⚠ Hydraulic activator ⚠ Spectrograph ⚠ Power station turbine ⚠ Automatic telephone switch ⚠ Mechanical lift ⚠ Automatic folder ⚠ Crusher ⚠ Lowers forks, Forklift raises ⚠ ★★★★★