| 361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
| 212 | DF | DISCHARGING OR PREVENTING ACCUMULATION OF ELECTRIC CHARGE (E.G., STATIC ELECTRICITY) {5} |
| 216 | DF | .~ Structurally combined with building or vehicle {1} |
| 217 | ![]() | .~.~ With external structure of vehicle {2} |
| 218 | DF | .~.~.~> Aircraft |
| 219 | DF | .~.~.~> Chain-type grounding means |