| 204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
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| 193 | DF | APPARATUS {5} |
| 194 | DF | .~ Electrolytic {11} |
| 196.01 | DF | .~.~ Object protection {15} |
| 196.1 |  | .~.~.~ Internal battery {10} |
| 196.11 | DF | .~.~.~.~> Resistor or impedance in series between anode and object |
| 196.12 | DF | .~.~.~.~> With fluid filter |
| 196.13 | DF | .~.~.~.~> With bypass means |
| 196.14 | DF | .~.~.~.~> Anode moving relative to object |
| 196.15 | DF | .~.~.~.~> With fluid inlet or outlet means used or protected {1} |
| 196.17 | DF | .~.~.~.~> Rigid anode with rigid support {1} |
| 196.2 | DF | .~.~.~.~> Flexible cable, chain, or wire anode or support |
| 196.21 | DF | .~.~.~.~> Earth grounded object or protection means |
| 196.22 | DF | .~.~.~.~> Copper and zinc electrically coupled or alloyed into one or more electrodes |
| 196.23 | DF | .~.~.~.~> Anode contains aluminum {2} |