| 摘要 |
PCT No. PCT/NL91/00160 Sec. 371 Date Feb. 25, 1993 Sec. 102(e) Date Feb. 25, 1993 PCT Filed Aug. 29, 1991 PCT Pub. No. WO92/04136 PCT Pub. Date Mar. 19, 1992.A treatment element is provided for treating the inside of pipes, which element is bulged out by a medium flow presence in the pipe (1), while the movement of the element through the pipe can be controlled by a flexible pulling element. This treatment element (2) comprises a radially free compressible bag, the edge (5) of the open edge (6) of which is connected to the flexible pulling element (4). A wall pan (3) running in the peripheral direction of the bag is pressed against the inner wall of the pipe by the thrust of the medium, through which the inner wall is treated.
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