| 204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
| 902 | ![]() | PRODUCTION OF DESIRED COMPOUND BY WAVE ENERGY IN PRESENCE OF A CHEMICALLY DESIGNATED NONREACTANT CHEMICAL TREATING AGENT (EXCLUDING WATER, CHLOROFORM, CARBON TETRACHLORIDE, METHYLENE CHLORIDE OR BENZENE) {8} |
| 903 | DF | .~> Inorganic chemical treating agent {1} |
| 907 | DF | .~> Silicon or boron treating agent |
| 908 | DF | .~> Phosphorus treating agent |
| 909 | DF | .~> Heavy metal treating agent |
| 910 | DF | .~> Sulfur treating agent |
| 911 | DF | .~> Nitrogen treating agent |
| 912 | DF | .~> Oxygen treating agent {1} |
| 914 | DF | .~> Only carbon, hydrogen or halogen atom in treating agent |