References
- ZadrogaL: Diploma thesis 97/98. Publ Instytut Spawalnictwa.
- Papkala , H and Pietras , A . 1997 . “ ‘Investigations into the resistance welding with changeable frequency welders’ ” . Gliwice : Publ Instytut Spawalnictwa . Research Report.
- 1990 . “ ‘Recommendations for the selection of the correct spot, projection and seam sheet welding method taking into account physical properties of the metal’ ” . W‐90/IS‐51 Gliwice : Publ Instytut Spawalnictwa .
- Pietras , A and Papkala , H . 1997 . “ ‘A study on the technology of welding’ ” . Gliwice : Publ Instytut Spawalnictwa . Research Report.
- Polish Standard PN‐79/H‐88026: ‘Aluminium alloys for metal forming. Grades’.
- Polish Standard PN‐L‐01423/1995: ‘Resistance welding of aircraft structures. Guidelines for the manufacture and control of spot and seam welded joints in aluminium alloys’.
- Polish Standard PN‐75/M‐69122: ‘Contact‐point electrodes with external conical grip for resistance‐spot welders’.
- Polish Standard PN‐79/H‐82160: ‘Aluminium for metal forming. Grades’.