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evolvent

切展线; 渐开线; 渐屈线; 渐伸线

The Collaborative International Dictionary of English v.0.48 (gcide)

Involute \In"vo*lute\, n. (Geom.)
A curve traced by the end of a string wound upon another
curve, or unwound from it; -- called also {evolvent}. See
{Evolute}.
[1913 Webster]

Evolvent \E*volv"ent\, n. [L. evolvens, -entis, unrolling, p.
pr. of evolvere.] (Geom.)
The involute of a curve. See {Involute}, and {Evolute}.
[1913 Webster]

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evolvent	查看　evolvent　在百度字典中的解释	百度英翻中〔查看〕
evolvent	查看　evolvent　在Google字典中的解释	Google英翻中〔查看〕
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