| 21. | The military authorities also installed their own equipment, including two radiotelephone prototypes constructed to withstand high altitude.
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| 22. | There is some international interconnectivity, with microwave radio relay and HF radiotelephone communications to Comoros as of 2001.
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| 23. | For example, on narrow-band radiotelephones, a channel spacing of 12.5 kHz is typical.
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| 24. | The UK introduced its'System 1'manual radiotelephone service as the South Lancashire Radiophone Service in 1958.
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| 25. | On the trip he also met Lee de Forest, inventor of the wireless radiotelephone and the vacuum tube.
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| 26. | In 1945 Young began work on mobile radiotelephone systems in vehicles for coverage of urban areas and along highways.
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| 27. | Under overcast skies, the protest flotilla is being shadowed by a French naval frigate, Mills said by radiotelephone.
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| 28. | The recovery party noted that the radio was discovered tuned to 2182 kHz, the international marine radiotelephone distress channel.
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| 29. | Herrold's primary radiotelephone effort was toward developing a commercial system suitable for point-to-point service.
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| 30. | An unnumbered phone ( radiotelephone ) award is available as well for using FM, or any other voice mode.
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