| 摘要 |
The shaft for water extraction, at reinforced concrete drains, has a tubular outflow (9) separate from the shaft (1), in a material which is different from the concrete and preferably of metal. It is integrated in a passage between the outer side and the hollow zone (8) of the shaft and especially concreted in place. A plug connection (10) gives a force fit between the outflow (9) and the outflow connection pipe (6). A sealing muff is made of an elastic material, such as rubber.
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