| 摘要 |
<p>Invention deals with loops for doors and windows containing first and second sheets connected by the axis of the loop. At least, one sheet of the loop has an adjusting part and installation element connected by the axis of the loop. At least one set of guiding surfaces is provided between the adjusting and installation parts, ensuring relative movement of the adjusting part and installation element in direction transverse to the axis of the loop, but not interfering with relative movement of these parts in longitudinal direction of the axis of the loop.</p> |
