TRANSFORMERS; CLOSED-CIRCUIT TELEVISION; KINESCOPE AND VIDEO RECORDERS; ELECTRONIC, THERMIONIC AND SOLID-STATE CONTROLS; HIGH-VOLTAGE GENERATORS; FILM-LOADING AND DARKROOM CABINETS; FILM-CARRYING CARTS AND CASES; FILM-DRYING AND STORAGE RACKS; EXPOSURE AND PROCESSING TIMERS AND PARTS FOR SUCH TELEVISION, RECORDERS, CONTROLS, GENERATORS, CABINETS AND TIMERS; X-RAY, NUCLEAR RADIATION, AND OTHER ELECTROMAGNETIC RADIATION AND ULTRASOUND EMITTERS, DETECTORS, ANALYZERS, HANDLERS, IN THE NATURE OF DEVICES TO PERMIT THE SAFE TRANSPORTATION AND UTILIZATION OF RADIATION-EMITTING SOURCES, MEASURERS IN THE DIMENSION OR THE ENERGY CHARACTERISTICS OF RADIATION, RESTRICTORS AND SHAPERS IN THE NATURE OF CONES AND COLLINATORS, FILTERS AND RECORDERS; DETECTORS AND TRANSDUCERS STIMULATED BY SUCH RADIATION OR ULTRASOUND FOR PRODUCING ELECTRICAL OR AUDIBLE SIGNALS OR VISUALLY-DETECTABLE IMAGES; PROCESSORS FOR X-RAY AND OTHER PHOTOGRAPHIC FILMS; FILM HOLDERS AND VIEWERS; X-RAY AND OTHER PHOTOGRAPHIC FILM CASSETTES; CAMERAS; THERMOMETERS; RADIOACTIVE MATERIAL HANDLERS; X-RAY AND NUCLEAR PHANTOMS; RADIATION-WARNING SIGNS; AND PARTS THEREFOR