Electric generator (hum): Listen & Download Electric generator (hum) .mp3 Error! Change your browser, please! ⇓ Download Laser welding ⚠ Signal for lunch at the factory ⚠ Small centrifuge ⚠ Working,, turning on, Welding transformer ⚠ Drone in a mine tunnel, Factory atmosphere ⚠ Power station turbine ⚠ Gas welding ⚠ Oil pump ⚠ Brewing unit, fluid drilling ⚠ Mill for grinding grain, Brewing unit ⚠ Power station generator ⚠ Spectrograph ⚠ ★★★★★