Factory atmosphere, drone in a mine tunnel: Listen & Download Drone in a mine tunnel, Factory atmosphere .mp3 Error! Change your browser, please! ⇓ Download Car factory ⚠ Stitching machine ⚠ Compressor industry ⚠ Signal for lunch at the factory ⚠ Electric welding ⚠ Spinning machine ⚠ Power station turbine ⚠ Newspaper press ⚠ Glass bottles on a conveyor line, room noise ⚠ Mechanical lift ⚠ Conveyor belt, Conveyor ⚠ Steam pump ⚠ ★★★★★