Romanesque style is characterized by rounded arches and domed ceilings that developed from the spherical shape of the east into vaulted structures in the west.
A decoration consisting of a usually continuous series of small spherical shapes, as on a convex molding.
It's not a bad idea but it doesn't explain why these objects have the same spherical shape and are located so close to each other.
The roller of these bearings are of spherical shape, and the spherical raceway surface of the housing washer is selfaligned.
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