| 378 / | HD | X-RAY OR GAMMA RAY SYSTEMS OR DEVICES |
| 119 | DF | SOURCE {3} |
| 121 | DF | .~ Electron tube {12} |
| 125 | ![]() | .~.~ With movable target {4} |
| 126 | DF | .~.~.~> Translation or nutation |
| 127 | DF | .~.~.~> Temperature modification {3} |
| 131 | DF | .~.~.~> With specific motor means |
| 132 | DF | .~.~.~> With specific bearing means {1} |