| 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} |
| 708 | | .~.~ Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum {5} |
| 709 | DF | .~.~.~> With preserving, recovering or separately handling or treating of the agent |
| 710 | DF | .~.~.~> Utilizing particulate form in fluid bed |
| 711 | DF | .~.~.~> In fused state |
| 712 | DF | .~.~.~> In gaseous state |
| 713 | DF | .~.~.~> In liquid state |