| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection nozzle that can smoothly inject repair material into cracks without leakage of the repair material during injection. SOLUTION: This nozzle has a cap body 26 made of an elastic material and fitted into the end of a nozzle pipe 12, the cap body 26 having a narrow, linear opening 26a in its end. The opening gets broader toward the rear end of the cap body so that at the rear end it serves as a circular opening 26b with a diameter about equal to or slightly smaller than the outside diameter of the cap body.
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