Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. [tool and equipment components]

Anotations

Scope note:

Toothed wheels, cones, or cylinders, or other machined elements that are designed to mesh with other similarly toothed elements for purposes which include the transmission of power and the change of speed or direction.