| 75 / | HD | SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES |
| 330 | DF | PROCESSES {9} |
| 392 | DF | .~ Producing or treating free metal {10} |
| 393 | DF | .~.~ Utilizing Radioactive material, producing or treating Radioactive metal {3} |
| 398 | DF | .~.~.~ Uranium(U) {1} |
| 399 | | .~.~.~.~ Reduction |