| 单词 | middle rail |
| 释义 | > as lemmasmiddle rail middle rail n. (a) the rail of a door level with the hands, to which the handle or lock is usually fixed; (b) a 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 (= third rail n. 1a). ΘΚΠ society > travel > rail travel > railway system or organization > [noun] > track > types of rail > conductor rail on electric railway trolley-rail1898 conductor rail1900 middle rail?1905 1678 J. Moxon Mech. Exercises I. vi. 106 The Middle Rail hath commonly two bredths of the Margent of the Stile, viz. one breadth above the Sur-base, and the other below the Sur-base. 1794 W. Felton Treat. Carriages I. 29 The middle rails..are..rabbetted on the top for the boarding or pannels. 1812 P. Nicholson Mech. Exercises 200 Middle Rail [of a door]. 1842 J. Gwilt Encycl. Archit. ii. iii. 568 In doors, the upper rails are called top rails; the next in descending, frize rails; the next, which are usually wider than the two first, are called the lock or middle rails. 1865 Catholic World Sept. 858/1 The French Government, on its portion of the line, will use locomotives with a peculiar mechanism, to produce adhesion, on a middle rail placed between the two ordinary rails. ?1905 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. 401/2 Middle rail, a heavy conductor in the form of a rail carried on insulating supports, which is laid between the running rails of an electric railway to supply current to the motors. 1993 Collins Compl. DIY Man. (new ed.) iii. 193/1 If a letter plate occupies the middle rail, place the knob above it on the muntin. < as lemmas |
| 随便看 |
|
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。