| 单词 | telegraph instrument |
| 释义 | > as lemmastelegraph instrument telegraph instrument n. ΚΠ 1845 U.S. Patent 4,318 1/1 Telegraph-instruments at opposite extremities of the same or of a single wire..may be kept in constant readiness for use in conjunction with a galvanic battery. 1923 National Geographic Mag. Apr. 402/1 Among loud-speaking telephones, telegraph instruments, and electric lights, the interlocking station director is a commanding general who is in constant touch with every sector held by his forces. 2009 R. Thomson Struct. Change Mech. Age vi. 180 Electricians were also listed in city directories, selling telegraph instruments, batteries, electromedical devices, and their own services. < as lemmas |
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