Even if the ball of Bowling does not have wax, it rolls.
Why is grease required at a bearing?
Since the ball and the cage always rubbed, grease was required for the bearing.
"A.D.B." which makes balls non-contact without a cage is introduced.
It is the model change for the first time in bearing 500 years.
Негізгі бет Ғылым және технология The bearing which a ball does not contact
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