| 摘要 |
<p>The pressure pipe is partic. for water-operated power stations. The ball joint has a convex spherical section on one pipe section working against a concave one on the other. One section (1) has a widened end forming a hollow spherical section (3), and the other (2) both a concave (4) and a convex (5) section, working against the surfaces of the hollow section. The concave section can be formed on a ring detachable from the respective pipe section.</p> |
