bn:05556049n
Noun Concept
Categories: Telegraphy, Russian inventions, Articles with short description
EN
needle telegraph
EN
A needle telegraph is an electrical telegraph that uses indicating needles moved electromagnetically as its means of displaying messages. Wikipedia
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EN
A needle telegraph is an electrical telegraph that uses indicating needles moved electromagnetically as its means of displaying messages. Wikipedia
A telegraph in which the signals are given by the deflections of a magnetic needle to the right or to the left of a certain position. Wiktionary
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