| 摘要 |
<p>A jewelry mandrel having a tapered shaft with an axial groove in the surface of the shaft. The axial groove is capable of accepting one end of a metal wire at a pre-selected location and the depth and width of the groove arc sized, such that the metal wire is not generally displaced axially from the pre-selected location as the wire is wound around the perimeter of a cross-section of the shaft.</p> |
