| 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 | ![]() | .~.~ With cooling means {2} |
| 689 | DF | .~.~.~> Fluid {5} |
| 704 | DF | .~.~.~> Thermal conduction {8} |