| 单词 | pump centre |
| 释义 | > as lemmaspump centre C1. Designating devices and mechanical contrivances in which an essential part moves out and in, like the plunger of a pump, or in which a component has such a motion, as pump centre, pump screw, pump spring, etc. ΚΠ 1825 ‘J. Nicholson’ Operative Mechanic 497 M, the pump spring to the detent. 1881 F. J. Britten Watch & Clockmakers' Handbk. (ed. 4) 133 Although the plate may be set true with the pump centre, it is liable to be drawn a little in fixing. 1884 F. J. Britten Watch & Clockmakers' Handbk. (new ed.) 216 Pump Cylinder, a sliding telescopic gauge used by chronometer makers for taking heights. 1901 J. Black Illustr. Carpenter & Builder Ser.: Scaffolding 52 Two sets of uprights are used, one set having pump screws and the other being provided with wedges. 2003 Hairflair Jan. 45/1 I like the fact that this has a pump-top so it doesn't dispense too much product. < as lemmas |
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