单词 | racket wheel |
释义 | Definition of racket wheel in English:racket wheelnoun ˈrakɪt ˌwiːl rare
OriginMid 18th century; earliest use found in William Emerson (1701–1782), mathematician. Variant or alteration of ratchet wheel, perhaps after rack. Definition of racket wheel in US English:racket wheelnounˈrakɪt ˌwiːl rare
OriginMid 18th century; earliest use found in William Emerson (1701–1782), mathematician. Variant or alteration of ratchet wheel, perhaps after rack. |
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