204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
193 | DF | APPARATUS {5} |
194 | DF | .~ Electrolytic {11} |
279 | DF | .~.~ Elements {3} |
280 | DF | .~.~.~ Electrodes {7} |
286 | DF | .~.~.~.~ With electrode supporting means {2} |
288 | .~.~.~.~.~ Electrodes with lateral extensions |