| 摘要 |
<p>The wall (1), preferably made of hollow bricks, has a hole (2) in of a diameter corresponding to that of the tubular dowel (12) for fixing the envelope (11) onto the plug (3). The plug (3) is inserted into the hole up to a flange (4). The cement-based mixture (6) is injected into the cavity (5) by means of an injector (7) with a hole (9) fitting the internal bore (8) of the plug. The hole (9) has a conical collar (10). When the mixture (6) is injected, the envelope (11) dilates like a balloon. A fixture-screw is inserted into the bore (8) of the plug when the injector (7) is removed.</p> |
