What are the components of the stainless steel ball
The surface of the stainless steel ball is a curved surface.
The ball round and similar, there is also a center called the center.
Through the center of the spherical surface is plane truncated by the circle is called big circle, is not through the center of the section of the circle is called round.
On the sphere, the shortest line between two points is the length of the circle is through these two points between the two a minor arc length, arc length of the sphere is called spherical distance between two points.
