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Two-horn system, USA 1921 |
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four-horn acoustic radar, Czech, 1920-an |
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four-horn acoustic locator, England, 1938 |
![]() |
four horn acoustic radar, England 1930-an |
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akoustic locator, Japan, 1930-an |
![]() |
Acoustic locator, German, 1930-an |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiAEm3rSgUwcFyyo5mrFA65hgfyIZePsMWtOVIsrUzK0TJqydmbcokigrkdGa15CARGa3VczglwafCyMv_GRTja2I4kXYGqAAYRzV2I3lWNEX987GmUk_jUdnborkD_cNqHP32Bm986hg/s1600/220px-Radar_antenna.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMRO2-C-zm9Lg-8aa8gh1kJKfFBlvzhBW73ZuaNSEccv6vzPpj-NPM45x_LyUpl0N3jFblwOQZ3owlvyF_TIfLSg6qn1JWIeIBHSzrlkhKV_r5IpaVZoLR4aPW_jos2vUW87eIfQteww/s320/radar-antenna.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMmIO4QMiUiFuxo_NDsP4oJYzomjGyclncoUM4JnPEW5_nJTizQ7At5dYyWJol14KTXSykYDl0uQeIZm418kofKkjkevH-1rkL4G-Wk7357X32mIxHXDTg720FeavupcsRUFxVVguOcg/s320/thalesraytheon18.jpg)
v12gether.
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![]() |
Two-horn system, USA 1921 |
![]() | ||||||||||||||||||||||||||||||||||||
four-horn acoustic radar, Czech, 1920-an |
![]() |
four-horn acoustic locator, England, 1938 |
![]() |
four horn acoustic radar, England 1930-an |
![]() |
akoustic locator, Japan, 1930-an |
![]() |
Acoustic locator, German, 1930-an |
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