The windings are arranged in radial or tangential planes.

A smooth surface is the envelope of its tangent planes.

The substrate plates (32, 34) are arranged in eccentric tangential planes parallel to the axis of rotation.

Furthermore, the tangent planes are inclined with respect to a radial plane which extends perpendicularly to the output axis.

Here, tangent planes to said surface points are inclined with respect to an axial plane which includes said output axis.

Furthermore, said tangential planes are inclined in relation to a radial plane which extends perpendicularly to the axis of rotation of the tool.

This seems even more surprising because the fractal nature is incompatible with the presence of tangent planes.

Planes tangential to said surface-area points are inclined in relation to an axial plane which encloses the axis of rotation of the tool.

The tangent planes of the track and the rolling surface coincide and are parallel to the plane (P) at at least one contact point.

Image-field flattening lenses (7) can be used to flatten the curved image field (3), the flattened image fields lying parallel to planes tangential to the curved image field (3).

This means that the surfaces are deformed in such a way that they remain minimal (they are even isometrical to each other and corresponding tangent planes are parallel).

Also, horizontal planes can intersect when they are tangent planes to separated points on the surface of the earth.

The invention relates to a joint, having an inner hub and an outer hub which have ball paths, and having balls, wherein the tangential planes at the contact points of the balls form an angle of inclination with the ball paths.

All components of the vehicle (10) are contained within the two planes tangent to the three wheels, such that the toy vehicle (10) may be operated on either of its two major sides (14, 16).

In this situation, although the planes being rolled over the surface are tangent planes in a naive sense, the notion of a tangent space is really an infinitesimal notion,[6] whereas the planes, as affine subspaces of R3, are infinite in extent.