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- Helix, helical surface
- Spirals
- Helicoids, e.g. Archimedes water pump
- Eccentrics and eccentricity
- Mobius band and its modifications
- Generation of motion with rolling curves of cycloids, epi- and hypocycloids
- Generation of motion with ellipse and ellipsoids
- Special three-dimensional curves, e.g. Frenet-pipe, Pinkall-pipe
- Balls, rollers and ellipses as a medium for supporting or transforming motion
- Application of transmissions and mechanisms for transformation of motion or its direction, speed, angular velocity, force, torque
- Application of harmonic drive gear principle to transmit radial motion through hermetic walls
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Geometric effects