324 / | HD | ELECTRICITY: MEASURING AND TESTING |
76.11 | DF | MEASURING, TESTING, OR SENSING ELECTRICITY, PER SE {46} |
154 R | DF | .~ With rotor (e.g., filar suspension, zero set, balancing) {2} |
155 | .~.~ With pivot (e.g., internal friction compensation, anticreep) |