NASA NTRS · 19910013733
Variable polarity arc welding
Abstract
Technological advances generate within themselves dissatisfactions that lead to further advances in a process. A series of advances in welding technology which culminated in the Variable Polarity Plasma Arc (VPPA) Welding Process and an advance instituted to overcome the latest dissatisfactions with the process: automated VPPA welding are described briefly.
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Bayless, E. O., Jr.. 1991-03-01. Variable polarity arc welding. https://ntrs.nasa.gov/citations/19910013733
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