| 148 / | HD | METAL TREATMENT |
|
| 95 | DF | PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17} |
| 559 | DF | .~ Heating or cooling of solid metal {22} |
| 566 | DF | .~.~ Electric heating with work as conductor (e.g., alternating current, induction, etc.) {2} |
| 567 |  | .~.~.~ Induction {6} |
| 568 | DF | .~.~.~.~> Wire or filament |
| 569 | DF | .~.~.~.~> Railway stock (e.g., rails, wheels, axles, etc.) |
| 570 | DF | .~.~.~.~> Of hollow bodies (e.g., pipe, sphere, etc.) {1} |
| 572 | DF | .~.~.~.~> Rod, axle, shaft, or roller |
| 573 | DF | .~.~.~.~> Gear, threaded article, drill or serrated work surface (e.g., saw blade, etc.) |
| 574 | DF | .~.~.~.~> And cooling with fluid contact {1} |