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between 10% cycles per second (3 meters-100 megacycles) and 4 × 10% (0.75 microns); and specialized parts and accessories of such apparatus; and specialized equipment for testing or calibra- ting such apparatus.
Radar and radio navigation equipment (other than direction- finders) operating at frequencies below one hundred megacycles per second.
Pulse modulators capable of providing electric impulses of peak power exceeding ten kilowatts; and pulse-transformers and pulse-forming equipment being specialized parts of such modulators.
Electromagnetic waveguides, resonant circuits radiators of a kind used at frequencies exceeding six hundred megacycles per second; and articles or equipment incorporating, or designed to be connected to or to be incorporated in any such item.
Communication equipment of a kind using infra-red radiation or ultrasonic waves; and specialized parts thereof.
Apparatus of a kind used to jam or otherwise interfere with radio reception, and specialized parts of such apparatus.
Communication equipment of a kind exclusively designed for use in sircraft; and specialized parts of such equipment.
Radio receivers panoramic, being receivers which search automatically a part of the radio-frequency spectrum and indicate visibly the signals received, and specialized parts of such receivers.
Telecontrol-equipment suitable for controlling pilotless air- craft and guided weapons.
Cathode-ray oscilloscopes with time basis shorter than two microseconds; and specialized parts of such apparatus.
Photomultiplier tubes and specialized parts thereof.
Valves, thermionic of a kind used with a potential difference exceeding nine thousand volts between electrodes, or of a kind used at frequencies exceeding two hundred and fifty megacycles per second, or of a kind that can be passed through a circular hole one-half inch in diameter; and specialized parts of such valves.
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Crystal rectifiers of a kind used at frequencies exceeding three thousand megacycles per second, and specialized parts of such rectifiers.
Cables of very low attenuation and high uniformity as used for frequencies of the order of magnitude of 3000 mc/s and above.
Design data, manufacturing technique and specialized tools for making any controlled items.
بالريد
Amplifiers, high gain, stable linear pulse designed to operate within the range of 50 cycles per second to to megacycles per second and of input resistance not less than to megohms,
Electrometers, except student type.
Marine Equipment.
Warships and hulls or parts of bulls for such ships. Multicore cables suitable for harbour defence purposes and minesweeping.
Gyro-compasses, gyro repeaters.
Magnetic and accoustic misesŵuping equipment.
Submarine batteries.
Carbamite.
Polyethelene.
Styrene.
Seisometer and gravimeters.
Meteorological sounding balloons, 1100 gr. or larger.
Clerk of Councils.
COUNCIL CHAMBER,
8th August, 1950.
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