Roller shutter box is assembled of identical elements which are provided with a dovetail shaped cutout and a deep narrow cutout, and bound a space serving to accommodate a roller shutter shaft

摘要

The roller shutter box is assembled of identical elements (1) which are provided with a dovetail shaped cutout (7) and a deep narrow cutout (8), and bound a space (2) serving to accommodate a roller shutter shaft (3).