74 / | HD | MACHINE ELEMENT OR MECHANISM |
5 R | DF | GYROSCOPES {10} |
5.4 | DF | .~ Gyroscope control {2} |
5.41 | .~.~ Erecting {6} | |
5.42 | DF | .~.~.~> By plural diverse forces |
5.43 | DF | .~.~.~> By jet |
5.44 | DF | .~.~.~> By weight |
5.45 | DF | .~.~.~> By friction |
5.46 | DF | .~.~.~> By magnetic field |
5.47 | DF | .~.~.~> By motor torque |