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 |