| 29 / | HD | METAL WORKING |
| 592 | DF | METHOD OF MECHANICAL MANUFACTURE {54} |
| 890.12 | DF | .~ Valve or choke making {5} |
| 890.124 | DF | .~.~ With assembly, disassembly or composite article making {3} |
| 890.126 | DF | .~.~.~ With material shaping or cutting {4} |
| 890.127 | ![]() | .~.~.~.~ Including molding or casting |