PugJesus@lemmy.worldM to

HistoryPorn@lemmy.worldEnglish · 11 months ago

Listening device for detecting aircraft, USA, 1921

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Listening device for detecting aircraft, USA, 1921

PugJesus@lemmy.worldM to

HistoryPorn@lemmy.worldEnglish · 11 months ago

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TragicNotCute@lemmy.world
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11 months ago
I love that the person operating just jams those tubes in their ears.

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