Postal sorting line: Listen & Download Postal sorting line .mp3 Error! Change your browser, please! ⇓ Download Car factory ⚠ Electric generator (hum) ⚠ Power station generator ⚠ Breakdown press ⚠ Conveyor, conveyor belt ⚠ Hydraulic activator ⚠ Forklift approaching ⚠ Electric welding ⚠ Forklift raises, lowers forks ⚠ Hydraulic machine up ⚠ Box making machine ⚠ Robotic assembly line ⚠ ★★★★★