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The eyes of Poland's air defense system during the Cold War: radar stations of Soviet and Polish production
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Soviet P-20 Periskop (NATO: Bar Lock), the USSR's first microwave (decimetric) wave radar. Introduced in 1949
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Northrop P 61 Black Widow USAAF WW2 Aircraft Blueprint" Poster for Sale by worldwarvintage | Redbubble
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Figure 17 from A History of U.S. Navy Periscope Detection Radar, Sensor Design and Development | Semantic Scholar
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