| 单词 | concentric main |
| 释义 | > as lemmasconcentric main concentric main n. now historical a main electricity supply cable consisting of one or more concentric cables.Used esp. in reference to the cable invented in 1890 by Sebastian de Ferranti (1864–1930), which consisted of a number of rigid concentric cables joined together. ΚΠ 1890 Electr. Engineer 20 June 484/2 The Ferranti concentric mains not being ready, the company laid and run from Deptford to Charing Cross temporary cables. 1912 Times 15 May 25/3 The concentric main could be run along the outside of the houses. 1995 Isis 86 42 He measured the capacitance and the resistance of Ferranti's concentric main, and he calculated its self-inductance. < as lemmas |
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