英语词汇“middle rail”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

middle rail

noun

1The rail of a door level with the hands, to which the handle or lock is usually fixed.

2A third, cogged, rail between the two running rails of a railway line, used in connection with a rack-and-pinion device on an engine for the ascent and descent of steep inclines; (later also) an additional rail between the two running rails which conveys the current in some electric railways.

Origin

Late 17th century; earliest use found in Joseph Moxon (1627–1691), printer and globe maker.

单词	middle rail
释义	middle rail noun 1The rail of a door level with the hands, to which the handle or lock is usually fixed. 2A third, cogged, rail between the two running rails of a railway line, used in connection with a rack-and-pinion device on an engine for the ascent and descent of steep inclines; (later also) an additional rail between the two running rails which conveys the current in some electric railways. Origin Late 17th century; earliest use found in Joseph Moxon (1627–1691), printer and globe maker.
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