involute curve

例句：

1. 1. The engineer drew a detailed diagramof the involute curve on theblueprint paper.
   工程师在蓝图纸上绘制了详细的回旋曲线图。
2. 2. The involute curve is used to describe theshape of a spiral staircase.
   回旋曲线用于描述螺旋楼梯的形状。
3. 3. Theinvolute curve is an important partof the design process for many mechanical systems.
   回旋曲线是许多机械系统设计过程中的一个重要部分。