| 摘要 |
A sealing apparatus (102) for sealing a tube is disclosed. The apparatus comprises a first inflatable tyre (110) adapted to be urged into sealing engagement with an inner wall (120) of a tube by means of pressurised fluid, and a second inflatable tyre (130) member adapted to be urged towards the inner wall by means of pressurised fluid to resist disengagement of the first inflatable tyre from the inner wall by means of pressurised fluid in the tube. |
