اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Author: Fleming, J. A. (John Ambrose), Sir, 1849-1945
Title: Hertzian Wave Wireless Telegraphy
Language: English
LoC Class: TK: Technology: Electrical, Electronics and Nuclear engineering
Subject: Telegraph, Wireless
Subject: Electric waves
Release Date: Jan 8, 2012
Copyright Status: Public domain in the USA.
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