324 / | HD | ELECTRICITY: MEASURING AND TESTING |
500 | DF | FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS {10} |
512 | DF | .~ For fault location {10} |
513 | DF | .~.~ Where component moves while under test {2} |
514 | .~.~.~ By exposing component to liquid or gas while under test |