| 摘要 |
The device (1) has one or more mouthpiece apertures, e.g. a ring gap (6), through which medium flows to clean the conduit inner walls. The cleaning mouthpiece is brought into contact with the conduit inner wall by an under pressure being created between it and the inner wall. The cleaning mouthpiece has a control (3.1) through which medium flows out from the ring gap or corresponding mouthpiece apertures in at least two different directions. The mouthpiece is made to move laterally along the pipe conduit inner wall by rotation of a feed conduit (2). |
