250 / | HD | RADIANT ENERGY |
336.1 | DF | INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING {16} |
374 | DF | .~ Including a radiant energy responsive gas discharge device {8} |
379 | DF | .~.~ With means to supply the gas {2} |
380 | .~.~.~ Radioactive gas, or with gas-borne radioactive material |