324 / | HD | ELECTRICITY: MEASURING AND TESTING |
160 | DF | ELECTRICAL SPEED MEASURING {7} |
166 | DF | .~ Including speed-related frequency generator {5} |
168 | DF | .~.~ Including periodic switch {2} |
169 | .~.~.~ In ignition system {1} | |
170 | DF | .~.~.~.~> High voltage speed signal type |