29 / | HD | METAL WORKING |
592 | DF | METHOD OF MECHANICAL MANUFACTURE {54} |
592.1 | DF | .~ Electrical device making {14} |
602.1 | DF | .~.~ Electromagnet, transformer or inductor {6} |
603.01 | DF | .~.~.~ Magnetic recording reproducing transducer (e.g., tape head, core, etc.) {4} |
603.02 | .~.~.~.~ Including dissassembly step |