| 单词 | guard action |
| 释义 | > as lemmasguard action guard action n. Horology (perhaps) the action connected with a guard-pin. ΘΚΠ the world > time > instruments for measuring time > clock > [noun] > part(s) of > action of overbanking1881 guard action1884 shutting off1884 1884 F. J. Britten Watch & Clockmakers' Handbk. (new ed.) 89 Double Roller Escapement, a variety of the Lever Escapement, in which a separate roller is used for the guard action. < as lemmas |
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