204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
193 | DF | APPARATUS {5} |
194 | DF | .~ Electrolytic {11} |
279 | DF | .~.~ Elements {3} |
297 R | .~.~.~ Electrode supports and work holders {2} | |
297 M | DF | .~.~.~.~> Workpiece held by magnetism or suction |
297 W | DF | .~.~.~.~> Workpiece rack |