| 摘要 |
The machine comprises a rotating cradle 7 which is driven in either direction by a motor 9 and inside which is mounted a drum 11 for reeling and unreeling a wire 12 which a roller-type advancing mechanism 14 drives axially in either of the two directions. The patent describes the arrangement of the tools designed to be fixed to the end of the wire 12 in order to clean the internal wall of pipes by means of axial movement and rotation. <IMAGE>
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