| 摘要 |
<p>A bush for insertion into a barrel top, has a polygonal flange, and is mfd. by deep drawing. At the joining point of the wall and the bottom of the flange, a circular tear line is formed for removal of the bush bottom. Flange (5) and wall (4) are supported by a tool section (26). A thread (27) is mfd., using a number of rollers (28).</p> |
