| 摘要 |
The invention relates to a method for repairing underground old pipelines in situ, during which a breaking tool, which is provided with a drive, or a pipe section is pulled with the aid of a hydraulic piston/cylinder unit starting from a normal inspection shaft to the next inspection shaft (machine shaft), which is placed, together with its housing, at least partially inside the old pipeline, in order to keep the interior of the machine shaft, which is extremely restricted, essentially free from machine parts. |
