| http://www.w3.org/ns/prov#value | - An arrangement for drivingly connecting a power transmission part such as a gear or sprocket and the like to a shaft comprising:a cylindrical shaft having a plurality of flat surfaces spaced around at least a portion of its periphery, each flat surface being spaced from an adjacent flat surface by an arcuate surface, the radius of which equals the radius of thecylindrical shaft, said flat surfaces
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