@misc{indiciaebd3c5f2b9dff,
  title = {The variable polarity plasma arc welding process: Characteristics and performance},
  author = {Hung, R. J. and Zhu, G. J.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920003061},
  note = {Source identifier: 19920003061}
}