219 / | HD | ELECTRIC HEATING |
678 | DF | MICROWAVE HEATING {15} |
745 | DF | .~ Field modification {3} |
746 | .~.~ With power feed structure {3} | |
747 | DF | .~.~.~> Phase shifting |
748 | DF | .~.~.~> Radiator (e.g., antenna, etc.) {1} |
750 | DF | .~.~.~> With tuning or particular modes |