| 单词 | track-brake |
| 释义 | > as lemmastrack-brake track-brake n. a railway brake which acts by pressure directly against the rail; also, a device consisting of rails with curved ends, kept in position alongside the ordinary rails by springs, which by friction automatically retards a vehicle passing over them by compressing the flanges of the wheels. ΚΠ 1903 Science Abstracts VI. §B. 57 The Westinghouse-Newell track brake... In this an electro~magnet..grips the rail with a pressure which may reach two tons. 1906 Westm. Gaz. 29 Oct. 7/2 It seems to Colonel Yorke that the track brake can at its best only be regarded as a supplementary to the wheel brakes. < as lemmas |
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