| 摘要 |
<p>A joint coupling comprises two pipe pieces (1), (5), which are in constant mutual communication and are partly inserted one into the other by way of respective curved portions (4,6) under fluid-tight engagement, said curved portions (4,6) being arranged for swivelling about a common axis (12) situated external to the joint coupling and containing the common centre of curvature of said curved portions (4,6). Means (13, 14, 15) are provided for locking/releasing the pipe pieces (1,5).</p> |
