| 单词 | θ197954 |
| 释义 | society > communication > telecommunication > telegraphy or telephony > telegraphy > telegraph > [noun] > types of (49) field telegraph1795 enunciator1847 A self-acting telegraphic signal. needle telegraph1847 a telegraph in which the signals are given by deflection of a magnetic needle. indicator-telegraph1875 a form of telegraph in which the letters of a message are indicated by a pointer on a dial-plate. multiple telegraph1876 a telegraph system on which many messages may be sent simultaneously over the same wire; cf. multiplex, adj. 5. harmonic telegraph1878 Relating to music, musical; in reference to ancient music, Relating to melody as distinguished from rhythm. Obsolete except in specific uses. Fullerphone1917 A form of telegraph invented in the First World War (1914–18) that used a weak direct current rather than the alternating current of conventional… telecon1946 A type of teleprinter which communicates over long distances by means of radio waves or underwater cables and which projects received messages on… Subcategories:— recording telegraphs (15) — printing telegraphs (16) — radio-telegraphs (10) |
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