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} |