References
- Bürger , M . 1987 . ‘Dispensing shielding gas in robot torches’ , Engineering Thesis TU Magdeburg
- 1981 . ‘Gas control cuts cost of GMA/GTA-welding’ . Welding Journal , 60 (10) : 42
- Zöllner , L , Röhner , B and Fröhlich , H . 1986 . ‘Possibility of saving CO2 and argon in mixed gas welding’ . ZIS-Mitteilungen Halle , 28 (6) : 667 – 671 .
- ‘Welding and cutting equipment with supplying devices for shielding gas, which is to be pre-heated’ . GDR Commercial patent No. 220830 A1 .
- Hering , A . 1986 . ‘Shielding gas flow in MIG/MAG welding torches’ , Engineering Thesis TU Magdeburg
- COMECON Standard 3235–81
- Verhagen , I and Liefkens , A . 1968 . ‘Shielding gas in submerged CO2 welding’ . Lasttechnik , 34 (9) : 207 – 209 .
- Schiebner , P . 1977 . ‘MAG-welding with mixed gases’ . ZIS-Mitteilungen , 19 (6) : 731 – 740 . Halle