| 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} |
| 688 | DF | .~.~ With cooling means {2} |
| 704 | DF | .~.~.~ Thermal conduction {8} |
| 720 | DF | .~.~.~.~ For printed circuit board {1} |
| 721 | ![]() | .~.~.~.~.~ Plural |