| 摘要 |
A device (100) for grinding a pipe from inside, which device comprises a spindle (110) arranged to be rotated. The device (100) further comprises protrusions (120) fastened to the spindle (110), the protrusions (120) comprising a strip (121) causing an elastic force when being bent, the protrusions (120) being arranged to position the device (100) or a part of it inside the pipe, and the protrusions (120) comprising blades (130) arranged to grind the inner surface of the pipe, while the spindle (110) is being rotated. |
