| 摘要 |
PURPOSE:To stabilize the quality at the joining of a crown and a winding stem while facilitating the working of parts by welding them. CONSTITUTION:A crown 1 and a winding stem 2 are joined together by welding, for example, butt welding and combination welding. This can eliminate the screw cutting and reduce the working cost. The regulation and management of the overall length can be faciliated according to the working accuracy of part units. |
