204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
193 | DF | APPARATUS {5} |
194 | DF | .~ Electrolytic {11} |
* | DD | .~.~ With movable electrode means {7} |
219 | .~.~.~ Liquid electrode {2} | |
220 | DF | .~.~.~.~> With electrode recirculation means |
221 | DF | .~.~.~.~> With oscillator, reciprocator or agitator |