Letter press: Listen & Download Letter press .mp3 Error! Change your browser, please! ⇓ Download Low frequency running engine ⚠ Postal sorting line ⚠ Laser welding ⚠ Robotic assembly line ⚠ Forklift, standby, on, off ⚠ Steam pump ⚠ Signal for lunch at the factory ⚠ Book press ⚠ Forklift raises, lowers forks ⚠ Hydraulic activator ⚠ Vibrosieve at the factory ⚠ Print imprinted in cardboard, Notches ⚠ ★★★★★