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A fact from Ball Bearing (advertisement) appeared on Wikipedia's Main Page in the Did you know column on 13 December 2008, and was viewed approximately 1,611 times (disclaimer) (check views). The text of the entry was as follows:
Discussion: Should the ball running over the car really be called a "Ball Bearing"? A ball bearing normally consists of two rings with balls inbetween.
Isn't this rather a marble run? Hugonet (talk) 19:44, 5 September 2013 (UTC)[reply]
