| 摘要 |
<p>The dowel (1) has a cylindrical formed dowel body (2) with an internal channel (10). The dowel body includes a number of recesses with unidirectional arranged expandable rails (6) that are freely moved radially outward to the dowel body. An internal channel includes a number or part of screw thread corresponding to an assigned threaded bolt and an assigned threaded rod (28) in magnitude and position of a pitch. Diameter of the internal channel is compared with diameters of the assigned threaded bolt and the threaded rod. An inner side of each expandable rail exhibits specific thickness.</p> |
