A clothoid curve is used with its fine feature for the shape of transition section between spherical head and cylindrical shell of pressure vessel.

• 利用回旋曲线的优良特性，将其做为压力容器部分半球形封头与圆柱筒体之间的过渡曲线，实现了在连接边缘上无附加边缘应力的光滑连接。