204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
193 | DF | APPARATUS {5} |
194 | DF | .~ Electrolytic {11} |
196.01 | DF | .~.~ Object protection {15} |
196.02 | DF | .~.~.~ With control means responsive to sensed condition {2} |
196.03 | .~.~.~.~ And programmed, cyclic, or time responsive control means |