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} |
748 | DF | .~.~ Printed circuit board {4} |
760 | DF | .~.~.~ Connection of components to board {9} |
777 | DF | .~.~.~.~ By specific pattern on board {2} |
778 | .~.~.~.~.~ Cross-connected |