204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
193 | DF | APPARATUS {5} |
194 | DF | .~ Electrolytic {11} |
242 | DF | .~.~ Cells {10} |
252 | DF | .~.~.~ Diaphragm type {6} |
253 | DF | .~.~.~.~ Plural cells {2} |
254 | DF | .~.~.~.~.~ Bipolar electrode {1} |
255 | DF | .~.~.~.~.~.~ With feeding and/or withdrawal means {1} |
256 | .~.~.~.~.~.~.~ Gas |