Signal for lunch at the factory: Listen & Download Signal for lunch at the factory .mp3 Error! Change your browser, please! ⇓ Download Working machine engine ⚠ Factory atmosphere, drone in a mine tunnel ⚠ Hydraulic activator ⚠ Spectrograph ⚠ Stitching machine ⚠ Turning on, working,, Welding transformer ⚠ Dry cleaning ⚠ Hydraulic down machine ⚠ Car factory ⚠ Postal sorting line ⚠ Power station generator ⚠ Canning machine ⚠ ★★★★★