| 摘要 |
A one-piece annular washer of resiliently deformable material has in at least one of its opposite faces radially outer and inner coaxial annular grooves which together with the axial opening of the washer form radially outer and inner coaxial annular skirt portions of generally triangular cross section. Preferably, the washer further has similar skirt portions formed on the other of its opposite faces and an annular fin generally axially extended from the radially inner skirt portion on one of its opposite faces.
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