| 361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
| 600 | DF | HOUSING OR MOUNTING ASSEMBLIES WITH DIVERSE ELECTRICAL COMPONENTS {11} |
| 679 | DF | .~ For electronic systems and devices {15} |
| 728 | ![]() | .~.~ Module {4} |
| 729 | DF | .~.~.~> Plural {3} |
| 736 | DF | .~.~.~> With printed circuit boards {8} |
| 746 | DF | .~.~.~> With specific dielectric material or layer |
| 747 | DF | .~.~.~> With locking means or device |