Glass bottles on a conveyor line, room noise: Listen & Download Room noise, Glass bottles on a conveyor line .mp3 Error! Change your browser, please! ⇓ Download Stamping press ⚠ Stitching machine ⚠ Automatic telephone switch ⚠ Postal sorting line ⚠ Box making machine ⚠ Power Plant Water Pumps ⚠ Signal for lunch at the factory ⚠ Electric generator (hum) ⚠ Welding, hammer knocking, Car factory ⚠ Conveyor, conveyor belt ⚠ Oil pump ⚠ Hydraulic pump ⚠ ★★★★★