| 摘要 |
The coupling system consists of a number of extrusions (13,14,15) between the shutter roller shaft (16) and a connecting piece (17) linked to the top slat of the shutter (18). The extrusions are articulated to one another by hooked and grooved edges, and the outer surface of each extrusion has one or more wedging notches (10) to engage with one edge of an adjustable wedging plate (9) which limits the degree of rotation of one extrusion relative to its neighbor.
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