| 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} |
| 689 | ![]() | .~.~.~ Fluid {5} |
| 690 | DF | .~.~.~.~> Air {4} |
| 699 | DF | .~.~.~.~> Liquid {1} |
| 701 | DF | .~.~.~.~> With heat exchanger unit |
| 702 | DF | .~.~.~.~> With cold plate or heat sink |
| 703 | DF | .~.~.~.~> With cooling fins |