relay magnet वाक्य
उदाहरण वाक्य
मोबाइल
- He was also responsible for several technical innovations of Morse's system, particularly the sending key and improved recording registers and relay magnets.
- The first commercial automatic telephone exchange, designed by Almon Brown Strowger, opened in La Porte, Indiana on 3 November 1892, and used two telegraph-type keys on the telephone, which had to be operated the correct number of times to control the vertical and horizontal relay magnets in the exchange.
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