Circular knitting machine: Listen & Download Circular knitting machine .mp3 Error! Change your browser, please! ⇓ Download Low frequency running engine ⚠ Forklift approaching ⚠ Small centrifuge ⚠ Spectrograph ⚠ Bottling plant ⚠ Power Plant Water Pumps ⚠ Factory Atmosphere ⚠ Dry cleaning ⚠ Electric generator (hum) ⚠ Industrial exhaust fan ⚠ Signal for lunch at the factory ⚠ Conveyor, conveyor belt ⚠ ★★★★★