| 312 / | HD | SUPPORTS: CABINET STRUCTURE |
| 31 | ![]() | WITH GAS OR VAPOR TREATMENT OF MATERIAL {3} |
| 31.01 | DF | .~> By wetted surface exposed to material chamber and continuously contacted by unconfined gas {2} |
| 31.1 | DF | .~> Mounted on container closure |
| 31.2 | DF | .~> Externally accessible {1} |