Gas welding: Listen & Download Gas welding .mp3 Error! Change your browser, please! ⇓ Download Letter press ⚠ Automatic telephone switch ⚠ Industrial exhaust fan ⚠ Power station generator ⚠ Gas welding ⚠ Hydraulic down machine ⚠ Postal sorting line ⚠ Circular knitting machine ⚠ Shutdown, run, Compressor, start ⚠ Book press ⚠ Signal for lunch at the factory ⚠ Welding transformer, working,, turning on ⚠ ★★★★★