| 427 / | HD | COATING PROCESSES |
| 299 | DF | WITH PRETREATMENT OF THE BASE {7} |
| 314 | DF | .~ Heating or drying pretreatment {3} |
| 318 | DF | .~.~ Metal base {1} |
| 319 | | .~.~.~ Metal coating {2} |
| 320 | DF | .~.~.~.~> Aluminum coating |
| 321 | DF | .~.~.~.~> Zinc or spelter coating (e.g., galvanizing, etc.) |