Letter press: Listen & Download Letter press .mp3 Error! Change your browser, please! ⇓ Download Notches, print imprinted in cardboard ⚠ Gas welding ⚠ Oil pump ⚠ Forklift approaching ⚠ Stamping press ⚠ Rattling, The atmosphere of the factory ⚠ Noise in, Grind wood with a grinder ⚠ Industrial exhaust fan ⚠ Car factory ⚠ Conveyor belt, Conveyor ⚠ Laser welding ⚠ Low frequency running engine ⚠ ★★★★★