| 单词 | link-motion |
| 释义 | > as lemmaslink-motion link-motion n. (a) Steam-engine a valve-gear for reversing the motion of the engine, etc., consisting of two eccentrics and their rods, which give motion to a slide-valve by means of a ‘link’; (b) Geometry a linkage in which all the points describe definite curves in the same plane or in parallel planes ( Cent. Dict.). ΚΠ 1849 J. Weale Rudim. Dict. Terms Archit. ii. 259/2 Link-motion, a new apparatus for reversing steam-engines. 1874 F. G. D. Bedford Sailor's Pocket Bk. vi. 168 Starting ahead or astern is effected by link motion. 1877 [see link-structure n.]. 1887 Encycl. Brit. XXII. 505/1 In Stephenson's link-motion—the earliest and still the most usual form—the link is [etc.]. < as lemmas |
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