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HistoryPhotos@piefed.socialEnglish · 11 days ago

Concrete acoustic mirror for long-range aircraft detection, Kent, UK, 1930

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cross-posted to:
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Concrete acoustic mirror for long-range aircraft detection, Kent, UK, 1930

media.piefed.social

PugJesus@piefed.socialM to

HistoryPhotos@piefed.socialEnglish · 11 days ago

5

cross-posted to:
militaryporn@lemmy.world

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JustTesting@lemmy.hogru.ch
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10 days ago
They’re still around, Tom Scott had a great video on these

HistoryPhotos@piefed.social

historyphotos@piefed.social

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HistoryPhotos is for photographs (or, if it can be found, film) of the past, recent or distant! Give us a little snapshot of history!

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Foster a continuous learning environment.
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Photos MUST be at LEAST 10 years old, and ideally over 20. We appreciate that we are living through events which will become history, but this is ultimately not a comm for news or current affairs, but events which have occurred some time in the past.

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