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 Included in tliis area also are the surveillance drones that will penetrate enemy lines to send or bring back information of the enemy. Here a wide variety of sensors — radar, automatic camera, and infrared, seismic devices are being studied and adapted...  Research and Development for Defense: Hearings Before the Committee on ... - الصفحة 45 بواسطة United States. Congress. House. Committee on Science and Astronautics - 1961 - عدد الصفحات: 178 عرض كامل -
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