41748549078781_page_252

41748549078781 | page 252 | https://thedailydialectics.com/pdfs/FIOA/41748549078781/41748549078781.pdf

Tr REF ID:A56914 —Seauritgantormstion— ~226— h. Recording Devices When radio communication followed the example of wire comnunication in adopting mechanical transmission and recording procedures, the high- “ speed traffic of foreign fixed radio stations was at first recorded by ‘means of wax matrix…