| 单词 | colour light signal |
| 释义 | > as lemmascolour light signal colour light signal n. Railways an electric fixed signal which gives instructions to the train driver by the colour of the light displayed, rather than by the position of the lights (cf. position light signal n. at position n. Compounds). ΚΠ 1909 in Index to Signal Lit. (1911) 77 (title) Effects of electric headlights on color light signals at night. 1924 Wall St. Jrnl. 16 Aug. 2/4 New York Central has ordered 175 color-light signals. 2001 P. J. G. Ransom Snow, Flood & Tempest ii. 41 The line was track-circuited and broken up into additional sections automatically or semi-automatically by colour light signals. < as lemmas |
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