| 摘要 |
<p>It relates to a plugging device comprising a plugging balloon (3) and, for improving the sealing of this plugging, at least one external pouch (11) which can be expanded under the action of a filling product, this pouch being arranged around at least part of the balloon to which it is preferably connected. The balloon may comprise an outer covering (5) containing an inflatable bladder (7). Application to plugging live gas pipes, in particular. <IMAGE></p> |
