Radiation detection and measurement systems and equipment, namely, handheld devices, namely, gamma ray spectrometers, surveyors and detectors, [ and personal radiation detectors;] portal and vehicle monitoring systems composed of detectors for use at vehicle entrances, rail entrances, raw material manufacturing systems, conveyor systems, dust and exhaust systems, waste streams, and construction sites; [ and airborne, mobile, ] [ and perimeter] [ radiation monitoring systems composed of detect...