| 单词 | block system |
| 释义 | > as lemmasblock system block system n. Railways a system by which a railway line is divided into block sections, controlled by signals and allowing only one train to occupy a block at any one time; cf. sense 21. ΘΠ society > travel > rail travel > railway system or organization > [noun] > types of signal system block system1864 lock and block1872 signalling1873 1864 Realm 29 June 1 The only remedy for the danger is the adoption of what is technically called the ‘block system.’ 1908 W. G. Raymond Elem. Railroad Engin. x. 120 The general method of operation of the automatic block system may be explained with the aid of Fig. 69. 1978 G. M. Kichenside & A. Williams Brit. Railway Signalling (ed. 4) i. 8 Here, at last, was an instrument that permitted the replacement of time-interval working by the block system, for the signalmen..could communicate with the men at adjoining stations or junctions. 1991 Mod. Railways Apr. 181/2 On the signalling front, plans are afoot for replacing the tokenless block system installed on the section west of Salisbury at the time of the singling of the route in 1967. < as lemmas |
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