involute curve

• 渐开线

involute curve的用法和样例：

例句

1. The curve traced by a point on a taut,inextensible string as it unwinds from another curve.
   切展线，渐开线当一根绷紧而不能拉长的细线从一弧线上延展出去时在其上一点所画的弧线。