| 204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
| 193 | DF | APPARATUS {5} |
| 194 | DF | .~ Electrolytic {11} |
| * | DD | .~.~ With movable electrode means {7} |
| 212 | DF | .~.~.~ Rotary {3} |
| 215 | ![]() | .~.~.~.~ With base treatment {2} |
| 216 | DF | .~.~.~.~.~> Stripping |
| 217 | DF | .~.~.~.~.~> Mechanical working |