| 摘要 |
<p>The branch pipe connection for a drainage pipe has a branch sleeve (7) with a plane collar (8) which is glued or welded to align with the opening (4) of the main pipe, which is surrounded by a projection (3). The sleeve is attached to a tubular fixing sleeve (5) having a collar (6) attached to the inner face of the projection on the main pipe side-walls.</p> |
