| 摘要 |
The present invention relates to a purely rolling bearing without cage member and sliding friction, comprising an inner race ring, an outer race ring, a number of rolling members provided between the inner and outer race rings, a number of positioning rolling members and two positioning rings. Every positioning rolling member is provided between two adjacent rolling members and contact therewith. The positioning rings are positioned on the slide way at two ends of the said positioning rolling members and keep rolling contact therewith.
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