324 / | HD | ELECTRICITY: MEASURING AND TESTING |
76.11 | DF | MEASURING, TESTING, OR SENSING ELECTRICITY, PER SE {46} |
111 | DF | .~ With storage means for voltage or current (e.g., condenser banks) {1} |
112 | .~.~ Tape, sheet (e.g., disk) or wire (e.g., magnetic) storage |