wireless telegraphy
Telegraphy by radio rather than by transmission cables / The use of radio to send signals by Morse code
The broad range of activities undertaken by people with some training in the discipline of history who generally work outside of specialized academic settings.
(organic chemistry) Any of a particular group of styryl lactones
plural of ferriprotoporphyrin
その博物館は初期の航海で使われた無線電信用の古い受信機を展示していた。
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