| 单词 | colour light signalling |
| 释义 | > as lemmascolour light signalling colour light signalling n. Railways a system of signalling using colour light signals; cf. position-light signalling n. at position n. Compounds. ΚΠ 1916 Electric Railway Jrnl. 25 Mar. 609/1 The standard aspects of the American Railway Association showed position-light signaling, but no color-light signaling. 1921 Railway Engineer 42 362/2 There are two kinds of light signals—colour light and position light. They have suddenly assumed greater importance because of..the opening..of a colour light signalling installation. 2007 P. Atterbury Along Lost Lines 40 Colour light signalling was first used in the 1920s, then spread rapidly over the network. However, the semaphore signal was still in widespread use in the 1980s. < as lemmas |
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