Before the working principle of the neck flat welding flange, let's talk about the components of the neck flat welding flange. The neck flat welding flange includes a flange with an inner hole in the
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An ellipsoid is a surface that may be obtained from a sphere by deforming it by means of directional scalings, or more generally, of an affine transformation.. An ellipsoid is a quadric surface, that is a surface that may be defined as the zero set of a polynomial of degree two in three variables.