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GALLOWS FRAME TELEPHONE [1 record]

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Record 1 1980-09-04

English

Subject field(s)
  • Telephones
DEF

Graham Bell' s gallows frame telephone transmitted the first speed sound on June 3rd 1875.

French

Domaine(s)
  • Téléphones
OBS

M. Ted Paul, conservateur adjoint, Division de la technologie des communications, Musée national des sciences et de la technologie, a confirmé l'équivalence de ces termes.

Spanish

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