| 摘要 |
<p>PURPOSE:To comparatively easily and surely perform the repairing work of the connecting part of a main pipe with a branch pipe at the repairing work of pipe line. CONSTITUTION:In a packer 11 having a nearly cylindrical main body part 12 in outer shape, the outer peripheral part of which is made of flexible material and inside the outer peripheral part of which a hollow chamber 16 is formed so as to make the outer peripheral part expandable and contractable by introducing fluid pressure in the hollow chamber 16, a flange part 13 is formed at one end of the main body part 12.</p> |
