单词 | pinion wire |
释义 | pinion wireMechanics noun Steel wire having grooves along its length at regular intervals round the circumference, so that its cross-section has the shape of a cog wheel, and from which small pinions (especially for clocks and watches) can be cut. OriginMid 18th century; earliest use found in James Anderson (1739–1808), agriculturist and political economist. |
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