| 单词 | ratch-wheel |
| 释义 | > as lemmasratch-wheel ratch-wheel n. now rare ΘΚΠ society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > cog or gear > ratchet ratch1696 ratchet wheel1736 ratchet1744 ratch-wheel1744 racket wheel1758 catch wheel1786 mousing1875 1744 Philos. Trans. 1740–41 (Royal Soc.) 41 567 The Roch-wheel to be cut with 48 Teeth. 1825 ‘J. Nicholson’ Operative Mechanic 314 The other end..by the motion of the arm G, is made to move the ratch-wheel. 1869 Sci. Amer. 20 Feb. 117/2 A handle, C, which is to be worked backwards and forwards, to which is attached a circular rack..which works in a pinion, E, with ratch wheel on the front wheel of the velocipede. 1974 Brit. Patent 1,378,228 3/1 On this segment there is a catch..which is engaged between the teeth of a ratch-wheel. < as lemmas |
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