| 73 / | HD | MEASURING AND TESTING |
| 66 | DF | ROTOR UNBALANCE {7} |
| 460 | DF | .~ Dynamic (spinning) {4} |
| 462 | | .~.~ With electrical sensor and indicator {4} |
| 463 | DF | .~.~.~> Wattmeter |
| 464 | DF | .~.~.~> Rotatable switch |
| 465 | DF | .~.~.~> Oscilloscope (cathode ray) |
| 466 | DF | .~.~.~> Stroboscopically illuminated {1} |