| 摘要 |
A ball joint including a ball member having a ball end, a socket member having a recess for pivotally receiving the ball end of the ball member and a retaining ring received in the recess of the socket member for retaining the ball end of the ball member in the recess. The socket member consists of at least two components of synthetic resin material, and the components are welded together by supersonic welding process.
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