| 摘要 |
<p>The invention relates to a device for opening up a branch point of a pipe assembly. The device comprises a tip part (14) arranged to be rotated, in connection with which there is at least one blade (15a-e), and spring-loaded centralizing means (20, 21, 30, 31) which are separate from the tip part (14) and arranged to remain essentially non-rotating as the tip part (14) is rotated.</p> |
