Signal for lunch at the factory: Listen & Download Signal for lunch at the factory .mp3 Error! Change your browser, please! ⇓ Download Compressor industry ⚠ Spectrograph ⚠ Gas welding ⚠ Turn off, Air compressor turn on ⚠ Crusher ⚠ Electric generator (hum) ⚠ Breakdown press ⚠ Low frequency running engine ⚠ Power station generator ⚠ Turning on, working,, Welding transformer ⚠ Laser welding ⚠ Brewing unit, fluid drilling ⚠ ★★★★★