205 / | HD | ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS |
687 | DF | ELECTROLYTIC MATERIAL TREATMENT (PRODUCT, PROCESS, AND ELECTROLYTE COMPOSITION) {8} |
742 | DF | .~ Water, sewage, or other waste water {11} |
761 | .~.~ Using electrode containing ferrous metal |