| 摘要 |
<p>PROBLEM TO BE SOLVED: To make it possible to surely perform a watertight test with low manufacturing costs and in such a state that a water-stop joint arranged inside a pipeline is covered.SOLUTION: A watertight testing device 1 includes: a flexible water-stop sheet 10 formed into a cylindrical shape, which covers a water-stop joint; and an extended segment 20. Rigid plates 11, 12 are fixed to the flexible water-stop sheet 10. The extended segment 20 includes pressing projection parts 21, 22 for pressing the rigid plates 11, 12, and a pressure-resistant part 23.</p> |
