| 摘要 |
A seal is formed between two relatively rotatable parts by mounting a plastic sealing member such as an annular plate between the parts so that a tapered lip or lips at one periphery of the member contacts and is resiliently deformed by a relatively rotatable surface of one of the parts. Upon initial relative rotation of the parts, frictional heating causes permanent deformation and melting of each lip to form a seal having a small annular clearance or play at said surface.
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