| 29 / | HD | METAL WORKING |
| 592 | DF | METHOD OF MECHANICAL MANUFACTURE {54} |
| 592.1 | DF | .~ Electrical device making {14} |
| 825 | DF | .~.~ Conductor or circuit manufacturing {8} |
| 874 | ![]() | .~.~.~ Contact or terminal manufacturing {3} |
| 875 | DF | .~.~.~.~> By powder metallurgy |
| 876 | DF | .~.~.~.~> By assembling plural parts {5} |
| 885 | DF | .~.~.~.~> With coating |