| 摘要 |
<p>A hub seal (16) having, in combination a casing unit (50) and an elastomeric seal unit (58), wherein the casing unit (50) is stiff but flexible and has an inwardly projecting radial flange (52) and wherein the elastomeric seal unit (58) is bonded to and overlies said radial flange (52), the surface of the elastomeric seal unit (58) has at least three ribs (66).</p> |
