| 423 / | HD | CHEMISTRY OF INORGANIC COMPOUNDS |
|
| 414 | DF | CARBON OR COMPOUND THEREOF {3} |
| 445 R | DF | .~ Elemental carbon {7} |
| 447.1 |  | .~.~ Fiber, fabric, or textile {7} |
| 447.2 | DF | .~.~.~> Product |
| 447.3 | DF | .~.~.~> From gaseous reactants |
| 447.4 | DF | .~.~.~> Prior treatment before carbonization (except with gaseous oxygen) {1} |
| 447.6 | DF | .~.~.~> Including reaction with gaseous oxygen |
| 447.7 | DF | .~.~.~> In specific atmosphere (other than vacuum or air) |
| 447.8 | DF | .~.~.~> Controlling varying temperature or plural heating steps |
| 447.9 | DF | .~.~.~> Carbonizing cellulosic material |