| 单词 | rocker pump |
| 释义 | > as lemmasrocker pump rocker pump n. Mechanics a pump whose piston is operated by means of a rocking lever. ΚΠ 1852 U.S. Patent 9,344 2/2 I am aware that rocker pumps have been constructed to be operated by handpower. 1892 Daily News 11 July 12/5 Rocker pumps, pair of 8in. lift pumps. 2007 M. S. Scriver Bronze Inside & Out xvi. vi. 323 At the edge is an oilwell rocker pump. < as lemmas |
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