Grind metal on a grinding machine in a factory: Listen & Download Grind metal on a grinding machine in a .mp3 Error! Change your browser, please! ⇓ Download Gas welding ⚠ Oil pump ⚠ Heidelberian sorting printer ⚠ Bottling plant ⚠ Working,, Welding transformer, turning on ⚠ Electric generator (hum) ⚠ Canning machine ⚠ Brewing unit, mill for grinding grain ⚠ Spinning machine ⚠ Hydraulic machine up ⚠ Lithographic press ⚠ Rattling, The atmosphere of the factory ⚠ ★★★★★