| 361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
| 500 | DF | ELECTROLYTIC SYSTEMS OR DEVICES {7} |
| 503 | DF | .~ Liquid electrolytic capacitor {5} |
| 517 | ![]() | .~.~ Casing {3} |
| 518 | DF | .~.~.~> With hermetic seal |
| 519 | DF | .~.~.~> With header, cover, or endseal {1} |
| 521 | DF | .~.~.~> With vent means |