The Story of Alternating Current Arc Welding
The Story of Alternating Current Arc Welding
The Story of Alternating Current Arc Welding цео филм ceo film online. Demonstrates the differences between alternating current and direct current arc welding processes, and in particular the finer control available with AC machines at the time.
- Жанр: Документарни
- Држава: United States
- директор:
- Глумци:
