| 摘要 |
<p>The wall duct has a connector (2) centring a plastic pipe (3) in a protective tube (1). A union nut (7) which can be screwed to a threaded body (6) can be supported on the connector (2). A supporting sleeve (4) with its flange (41) butting against the face of the plastic pipe (3) is secured in the plastic pipe (3). A shaped sealing washer (5) is fitted around the plastic pipe (3) and held between the flange (41) and the connector (2). Between the threaded body (6) and the connector (2) there is a graphite ring (8). The jacket tube (1), the connector (2), the union nut (7), the supporting sleeve (4) and the threaded body (6) are made of stainless steel.</p> |
