| 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} |
| 783.5 | ![]() | .~.~ Using solid electrolyte {1} |
| 784 | DF | .~.~.~> Gaseous oxygen or oxygen containing compound {2} |