| 摘要 |
<p>The ring comprises an inner ring (21) fixed to a shaft, an outer ring (23) held against a thrust surface, and an intermediate ring (22) between them. The inner and outer rings are of metal, while the intermediate rings of a polymer, with the dimensions of the rings selected so that at ambient temperature the intermediate ring is fixed to one of the other two rings and set with a clearance from the second ring.</p> |
