| 摘要 |
The invention relates to a ductile cast iron driving tube for inaccessible tunnels produced by underground driving, in particular for producing house connections for sewers. According to the invention, the driving tube is to consist of: a) a tube shaft (1) of ductile cast iron, b) a sleeve (9) integrated in the tube wall and having an internal thread (3), c) a seat (4), arranged in the sleeve (9), for accommodating a sealing element (5), and d) a matching external thread (10) arranged on the tube end (8) remote from the sleeve (4). The figure is to be attached to the abstract. |
