| 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} |
| 579 | DF | .~.~ Iron(Fe) or iron base alloy {24} |
| 590 |  | .~.~.~ Pipe or tube {4} |
| 591 | DF | .~.~.~.~> Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum |
| 592 | DF | .~.~.~.~> Nine percent or more chromium(Cr) (e.g., stainless steel, etc.) |
| 593 | DF | .~.~.~.~> With working |
| 594 | DF | .~.~.~.~> With work handling |