英语词汇“rock shaft”的意思、释义、用法解释及翻译-双龙斋书画网

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词汇	rock shaft
释义	Definition of rock shaft in English: rock shaft noun ˈrɒk ʃaftˈrɒk ʃɑːft Mechanics A shaft which rocks back and forth about its axis rather than turning continuously; especially (a) one causing valves in an engine to open and close; (b) one on a tractor for giving oscillatory motion to an attached implement. Origin Mid 19th century; earliest use found in National Gazette (Philadelphia). From rock + shaft. Definition of rock shaft in US English: rock shaft noun Mechanics A shaft which rocks back and forth about its axis rather than turning continuously; especially (a) one causing valves in an engine to open and close; (b) one on a tractor for giving oscillatory motion to an attached implement. Origin Mid 19th century; earliest use found in National Gazette (Philadelphia). From rock + shaft.
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