| 摘要 |
The present invention provides a dual steel ball bearing retainer. Dual rows of several round indentations are placed on the bearing retainer element, and the indentations are placed in several dual rows with steel balls inlayed therein. The bearing retainer is placed on the axle, and a housing is placed on an outside, and the movement is created by the friction between the steel ball of the bearing retainer and the housing moving up and down.
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