| 摘要 |
<p>The element (6) has two interlocking portions (12a, 12b) mounted on respective hinges (14a, 14b). Each interlocking portion comprises thread parts (13a, 13b) and two half-grooves (20a, 20b) that are defined by half plates (19a, 19b) and half-shoulders (21a, 21b). The half-grooves are combined together to define a groove in a closed position of the element. The groove receives a sleeve during rotation of the element in the sleeve. The half-plates, half grooves and the half-shoulders are chamfered according to a plane parallel to an opening plane of the element. The holding element is made by an injection molding of thermoplastic. An independent claim is also included for a method for a doubling a wall.</p> |
