Radiation detectors; gamma radiation detectors; radon detectors; heat detectors; gas detectors; detectors, namely, for locating nuclear, radiological and conventional weapons of mass destruction, illegal and contraband materials, and components for all of the foregoing

Radiation detectors; gamma radiation detectors; radon detectors; heat detectors; gas detectors; detectors, namely, for locating nuclear, radiological and conventional weapons of mass destruction, illegal and contraband materials, and components for all of the foregoing