A cylindrical surface or solid all of whose sections perpendicular to the elements are elliptical.
A cylindrical surface or solid all of whose sections perpendicular to the elements are elliptical.
椭圆柱与组成要素垂直的所有圆柱形表面或柱体的部分是椭圆形的柱体
A cylindrical surface or solid all of whose sections perpendicular to the elements are elliptical.
椭圆柱与组成要素垂直的所有圆柱形表面或柱体的部分是椭圆形的柱体