| 204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
| 193 | DF | APPARATUS {5} |
| 194 | DF | .~ Electrolytic {11} |
| 196.01 | DF | .~.~ Object protection {15} |
| 196.33 | DF | .~.~.~ Flexible cable, chain, or wire anode or support {1} |
| 196.34 | ![]() | .~.~.~.~ Plural anode sections on single cable, chain, or wire {1} |
| 196.35 | DF | .~.~.~.~.~> Helically wound |