| 摘要 |
Device 1 for repairing pipelines 2 in situ, especially for drainage pipelines which cannot be visited, comprising: a central section B having a diameter less than that of the pipeline; two front A and rear C sections comprising means 10 for guiding the device into the pipeline, sealing means 16 for isolating the section B from the rest of the pipeline and scraping means 13; means 9 in the section C for bringing a repairing material to the outside of the central section B; and means 19 for fastening to the section A in order to move the device in the pipeline. <IMAGE>
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