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Receivers in the ceiling allowed them to use radiophones.

Some of the confusion might be explained by poor communications between Ahuas and the outside world – there was only the hospital’s radiophone and mail that reached the post irregularly.

Spec′trophōne, an adaptation of the spectroscope, in which, on the principle of the radiophone, perception of a succession of sounds takes the place of observation by the eye.—adj.

“And the best of it is, he is to radiophone,” added Bob to Joe.

Afield, you wore a spacesuit, and conversed by helmet radiophone.