| 205 / | HD | ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS |
| 775 | DF | ELECTROLYTIC ANALYSIS OR TESTING (PROCESS AND ELECTROLYTE COMPOSITION) {19} |
| 782 | DF | .~ For oxygen or oxygen containing compound (except water) {4} |
| 782.5 | ![]() | .~.~ Using semipermeable membrane {1} |
| 783 | DF | .~.~.~> Gaseous oxygen or oxygen containing compound |