| 摘要 |
PURPOSE: A ball joint is provided to prevent the leakage of a melt solution by having a guide member between a ball and a shank. CONSTITUTION: A ball joint comprises: a ball(100) inserted to a holder to rotate; a shank(110) joined with the ball; and a guide member(120) provided to one side of the ball or the shank to cut off the leakage of a melt solution caused when the ball and the shank are joined and composed of an elastic or plastic deformable material or a heat resisting material.
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