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#morse code #dah #electric signal #telegraph #signal pulse

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#energy wave #light pulse #electromagnetic pulse #signal pulse #physics wave #pulse train #electrical signal

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#electromagnetic spectrum #energy wave #signal pulse #physics wave #abstract signal #non-ionizing radiation

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#digital pulse #signal pulse #light pulse #data blip #abstract pulse

📍〰️)))

#location beacon #emitting signal #point of origin signal #signal pulse #transmitting location #SOS signal